VirtualBox UI (Qt5GuiVBox.dll) for Windows crashes on start up

[0xc0000022]

The VirtualBox GUI simply freezes on load and then crashes. To "fix" this, I have to uninstall/reinstall but the problem eventually reappears. Not sure how to reproduce though.

!analyze-v output is below.

Note that this happens on the latest version (6.1.28) although the dump below is from 6.1.26 because I wanted to see if previous versions also have this problem (which they obviously do) and I didn't save the 6.1.28 dumps. But the root case is the same as seen in the Event Log entries.

Faulting application name: VirtualBox.exe, version: 6.1.28.47628, time stamp: 0x616db42a
Faulting module name: Qt5GuiVBox.dll, version: 5.6.2.0, time stamp: 0x58e261e1
Exception code: 0xc000041d
Fault offset: 0x00000000001e384e
Faulting application path: C:\Program Files\Oracle\VirtualBox\VirtualBox.exe
Faulting module path: C:\Program Files\Oracle\VirtualBox\Qt5GuiVBox.dll


Faulting application name: VirtualBox.exe, version: 6.1.26.45957, time stamp: 0x6101832f
Faulting module name: Qt5GuiVBox.dll, version: 5.6.2.0, time stamp: 0x58e261e1
Exception code: 0xc0000005
Fault offset: 0x00000000001e384e
Faulting application path: C:\Program Files\Oracle\VirtualBox\VirtualBox.exe
Faulting module path: C:\Program Files\Oracle\VirtualBox\Qt5GuiVBox.dll

0:000> !analyze -v
*******************************************************************************
*                                                                             *
*                        Exception Analysis                                   *
*                                                                             *
*******************************************************************************

DUMP_CLASS: 2

DUMP_QUALIFIER: 400

CONTEXT:  (.ecxr)
rax=0000000000000000 rbx=00007fffb5fdb610 rcx=0000000006388c70
rdx=000000000304e4e8 rsi=00000000004f5f00 rdi=00000000004f63f0
rip=00007fff25d9384e rsp=00000000004f66a0 rbp=00000000182a0100
 r8=000000000304e490  r9=0000000000000000 r10=000000000304e490
r11=000000000304e4e8 r12=0000000000000000 r13=0000000004e90c50
r14=00000000042b7600 r15=00000000058bbd58
iopl=0         nv up ei pl zr na po nc
cs=0033  ss=002b  ds=002b  es=002b  fs=0053  gs=002b             efl=00010244
Qt5GuiVBox!QRasterPaintEngine::transformChanged+0x1e:
00007fff`25d9384e 8388b803000040  or      dword ptr [rax+3B8h],40h ds:00000000`000003b8=????????
Resetting default scope

FAULTING_IP: 
Qt5GuiVBox!QRasterPaintEngine::transformChanged+1e
00007fff`25d9384e 8388b803000040  or      dword ptr [rax+3B8h],40h

EXCEPTION_RECORD:  (.exr -1)
ExceptionAddress: 00007fff25d9384e (Qt5GuiVBox!QRasterPaintEngine::transformChanged+0x000000000000001e)
   ExceptionCode: c000041d
  ExceptionFlags: 00000001
NumberParameters: 0

PROCESS_NAME:  VirtualBox.exe

ERROR_CODE: (NTSTATUS) 0xc000041d - An unhandled exception was encountered during a user callback.

EXCEPTION_CODE: (NTSTATUS) 0xc000041d - An unhandled exception was encountered during a user callback.

EXCEPTION_CODE_STR:  c000041d

WATSON_BKT_PROCSTAMP:  6101832f

WATSON_BKT_PROCVER:  6.1.26.45957

PROCESS_VER_PRODUCT:  Oracle VM VirtualBox

WATSON_BKT_MODULE:  Qt5GuiVBox.dll

WATSON_BKT_MODSTAMP:  58e261e1

WATSON_BKT_MODOFFSET:  1e384e

WATSON_BKT_MODVER:  5.6.2.0

MODULE_VER_PRODUCT:  Qt5

BUILD_VERSION_STRING:  19041.1.amd64fre.vb_release.191206-1406

NTGLOBALFLAG:  0

PROCESS_BAM_CURRENT_THROTTLED: 0

PROCESS_BAM_PREVIOUS_THROTTLED: 0

APPLICATION_VERIFIER_FLAGS:  0

PRODUCT_TYPE:  1

SUITE_MASK:  272

DUMP_FLAGS:  8000c07

DUMP_TYPE:  3

THREAD_ATTRIBUTES: 
OS_LOCALE:  ENU

BUGCHECK_STR:  FATAL_USER_CALLBACK_EXCEPTION

DEFAULT_BUCKET_ID:  FATAL_USER_CALLBACK_EXCEPTION

PRIMARY_PROBLEM_CLASS:  FATAL_USER_CALLBACK_EXCEPTION

PROBLEM_CLASSES: 

    ID:     [0n321]
    Type:   [@APPLICATION_FAULT_STRING]
    Class:  Primary
    Scope:  DEFAULT_BUCKET_ID (Failure Bucket ID prefix)
            BUCKET_ID
    Name:   Omit
    Data:   Add
            String: [FATAL_USER_CALLBACK_EXCEPTION]
    PID:    [Unspecified]
    TID:    [Unspecified]
    Frame:  [0]

LAST_CONTROL_TRANSFER:  from 00007fff25da0c3e to 00007fff25d9384e

STACK_TEXT:  
00000000`004f66a0 00007fff`25da0c3e : 00000000`0304e3c0 00000000`00000001 4079b000`00000000 40886800`00000000 : Qt5GuiVBox!QRasterPaintEngine::transformChanged+0x1e
00000000`004f66d0 00000000`61055708 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`004f6898 : Qt5GuiVBox!QPainter::PixmapFragment::create+0x90e
00000000`004f67b0 00000000`6105842f : 00000000`00000000 00000000`004f6a40 00000000`00000000 00000000`00000020 : Qt5WidgetsVBox!QGraphicsScene::wheelEvent+0x748
00000000`004f6940 00000000`61059e97 : 00000000`04e90c50 00000000`058bbd00 00000000`04e90c50 00000000`04e90c50 : Qt5WidgetsVBox!QGraphicsScene::removeItem+0x98f
00000000`004f6c20 00000000`6106ee42 : 00000000`0638b010 00000000`04e90c50 00000000`058bb880 00000000`0680a350 : Qt5WidgetsVBox!QGraphicsScene::destroyItemGroup+0x337
00000000`004f6d80 00000000`60d9ff5f : 00000000`61571a58 00000000`00000008 00000000`60d50000 00000000`00000000 : Qt5WidgetsVBox!QGraphicsView::paintEvent+0x622
00000000`004f7260 00000000`60e8d407 : 00000000`00000000 00000000`004f7d68 00000000`00000000 00000000`00000000 : Qt5WidgetsVBox!QWidget::event+0x59f
00000000`004f7430 00000000`61070644 : 00000000`00000024 00000000`61116ca8 00000000`61116ca8 00000000`067ea400 : Qt5WidgetsVBox!QFrame::event+0x37
00000000`004f7460 00000000`614739de : 00000000`027ef720 00000000`067ea400 00000000`00000000 00000000`00000000 : Qt5WidgetsVBox!QGraphicsView::viewportEvent+0xa4
00000000`004f74e0 00000000`60d653fe : 00000000`027efd40 00000000`0271aec0 00000000`067ea400 00000000`004f7d68 : Qt5CoreVBox!QCoreApplicationPrivate::sendThroughObjectEventFilters+0xde
00000000`004f7540 00000000`60d6a7bb : 00000000`023ea2e0 00000000`004f7670 00000000`004f7d68 00007fff`b8235ba1 : Qt5WidgetsVBox!QApplicationPrivate::notify_helper+0xfe
00000000`004f7570 00000000`61475038 : 00000000`004ff490 00000000`023ea2e0 00000000`004f7d68 00000000`067ea400 : Qt5WidgetsVBox!QApplication::notify+0x1c4b
00000000`004f7c60 00000000`60d9e49b : 00000000`067ea400 00007fff`25f54710 00000000`0663a100 00000000`023ea2e0 : Qt5CoreVBox!QCoreApplication::notifyInternal2+0xa8
00000000`004f7cc0 00000000`60d91fb1 : 00000000`004f80d0 00000000`02fc46d0 00000000`02fc46d0 00000000`ffffffff : Qt5WidgetsVBox!QWidgetPrivate::drawWidget+0x8db
00000000`004f7e10 00000000`60d9e66b : 00000000`058bb880 00000000`0663a188 00000000`058bb898 00000000`00000002 : Qt5WidgetsVBox!QWidgetPrivate::paintSiblingsRecursive+0x391
00000000`004f7f20 00000000`60d91fb1 : 00000000`004f8330 00000000`058bb880 00000000`058bb880 00000000`ffffffff : Qt5WidgetsVBox!QWidgetPrivate::drawWidget+0xaab
00000000`004f8070 00000000`60d9e66b : 00000000`02fc4e10 00000000`0663a188 00000000`02fc4e28 00000000`00000002 : Qt5WidgetsVBox!QWidgetPrivate::paintSiblingsRecursive+0x391
00000000`004f8180 00000000`60d91fb1 : 00000000`004f86a0 00000000`02fc4e10 00000000`02fc4e10 00007fff`00000000 : Qt5WidgetsVBox!QWidgetPrivate::drawWidget+0xaab
00000000`004f82d0 00000000`60d91ec6 : 00000000`04a168a0 00000000`0663a188 00000000`04a168b8 00007fff`00000001 : Qt5WidgetsVBox!QWidgetPrivate::paintSiblingsRecursive+0x391
00000000`004f83e0 00000000`60d9e66b : 00000000`04a168a0 00000000`0663a188 00000000`04a168b8 00000000`00000003 : Qt5WidgetsVBox!QWidgetPrivate::paintSiblingsRecursive+0x2a6
00000000`004f84f0 00000000`60d91fb1 : 00000000`004f8900 00000000`04a168a0 00000000`04a168a0 00000000`ffffffff : Qt5WidgetsVBox!QWidgetPrivate::drawWidget+0xaab
00000000`004f8640 00000000`60d9e66b : 00000000`02fc4c40 00000000`0663a188 00000000`02fc4c58 00000000`00000001 : Qt5WidgetsVBox!QWidgetPrivate::paintSiblingsRecursive+0x391
00000000`004f8750 00000000`60d91fb1 : 00000000`0661f28c 00000000`02fc4c40 00000000`02fc4c40 00000000`00000001 : Qt5WidgetsVBox!QWidgetPrivate::drawWidget+0xaab
00000000`004f88a0 00000000`60d9e66b : 00000000`02f990d0 00000000`0663a188 00000000`02f990e8 00000000`00000003 : Qt5WidgetsVBox!QWidgetPrivate::paintSiblingsRecursive+0x391
00000000`004f89b0 00000000`60d70dfb : 00000000`030394c0 00000000`004f8c00 00000000`615785c8 00000000`005e99a8 : Qt5WidgetsVBox!QWidgetPrivate::drawWidget+0xaab
00000000`004f8b00 00000000`60d71026 : 00000000`0661f240 00000000`0661f201 00000000`00000000 00000000`00000000 : Qt5WidgetsVBox!QWidgetPrivate::invalidateBuffer_resizeHelper+0x1e0b
00000000`004f8f70 00000000`60d91197 : 00000000`00000000 00007fff`0000000b 00000000`050eb6f0 00000000`064810f0 : Qt5WidgetsVBox!QWidgetPrivate::invalidateBuffer_resizeHelper+0x2036
00000000`004f8fd0 00000000`60dbcd32 : 00000000`004f9820 00000000`00000000 00000000`027ef720 00000000`0000001d : Qt5WidgetsVBox!QWidgetPrivate::syncBackingStore+0x47
00000000`004f9000 00000000`60d65412 : 00000000`064810f0 00000000`027efd40 00000000`064810f0 00000000`004f9820 : Qt5WidgetsVBox!QWidget::underMouse+0x3a42
00000000`004f9070 00000000`60d6a7bb : 00000000`027efd40 00000000`004f91a0 00000000`004f9820 00000000`004f9820 : Qt5WidgetsVBox!QApplicationPrivate::notify_helper+0x112
00000000`004f90a0 00000000`61475038 : 00000000`004ff490 00000000`023ea2e0 00000000`004f9820 00000000`06481000 : Qt5WidgetsVBox!QApplication::notify+0x1c4b
00000000`004f9790 00007fff`25bdce55 : 00000000`06639d80 00000000`00000011 00000000`00000000 00000000`023ea2e0 : Qt5CoreVBox!QCoreApplication::notifyInternal2+0xa8
00000000`004f97f0 00007fff`25be5d42 : 00000000`064810f0 00000000`00000000 00000000`06639d80 00007fff`25bc49e0 : Qt5GuiVBox!QGuiApplicationPrivate::processExposeEvent+0x115
00000000`004f9890 00007fff`25bc4c09 : 00007fff`261615c0 00000000`06639d80 00000000`00000000 00007fff`25bc4eb7 : Qt5GuiVBox!QGuiApplicationPrivate::processWindowSystemEvent+0x132
00000000`004f98e0 00007fff`25bc4e26 : 00000000`00000001 00007fff`261615c0 00000000`027efd40 00000000`00070f6c : Qt5GuiVBox!QWindowSystemInterface::sendWindowSystemEvents+0x99
00000000`004f9910 00007fff`3f5661b9 : 00000000`00000001 00007fff`261615c0 00000000`061908c0 00000000`00070f6c : Qt5GuiVBox!QWindowSystemInterface::flushWindowSystemEvents+0x176
00000000`004f9960 00007fff`3f570cf5 : 00000000`03d6d4a0 00000000`027fc358 00000000`027fc358 00000000`061908c0 : qwindows+0x61b9
00000000`004f9a10 00007fff`3f57134c : 00000000`027fc358 000061c8`000061c8 00000000`0000000f 00000000`00000000 : qwindows+0x10cf5
00000000`004f9b30 00007fff`b735e7e8 : 00000000`00070f6c 00000000`004fa050 00000000`00000000 00000000`00000000 : qwindows+0x1134c
00000000`004f9bd0 00007fff`b735e36c : 00000000`000020c8 00007fff`3f5712f0 00000000`00070f6c 00000000`0000000f : user32!UserCallWinProcCheckWow+0x2f8
00000000`004f9d60 00007fff`b7370f93 : 00000000`00000000 00000000`00000000 00000000`00000000 00007fff`b735a553 : user32!DispatchClientMessage+0x9c
00000000`004f9dc0 00007fff`b82b0ba4 : 00000000`004fa630 00007fff`b672e71b 00000000`004f9ee0 00000000`004f9f10 : user32!_fnDWORD+0x33
00000000`004f9e20 00007fff`b6201704 : 00007fff`b735e27a 00000000`004fa630 00007fff`b672e71b 00000000`004f9f70 : ntdll!KiUserCallbackDispatcherContinue
00000000`004f9ea8 00007fff`b735e27a : 00000000`004fa630 00007fff`b672e71b 00000000`004f9f70 00000000`004fa050 : win32u!NtUserDispatchMessage+0x14
00000000`004f9eb0 00007fff`b672eb6b : 00007fff`3f5712f0 00000000`004fa630 00000000`00280000 00000000`0000000f : user32!DispatchMessageWorker+0x29a
00000000`004f9f30 00007fff`b672ceda : 00000000`004f0020 00000000`00000028 00000000`02d49160 00000000`00000000 : combase!CCliModalLoop::HandleWakeForMsg+0x1c3
00000000`004f9fd0 00007fff`b672cbbb : 00000032`60f203a7 00000000`004fa0c0 00000000`032b4a5e 00000000`02d8dab0 : combase!CCliModalLoop::BlockFn+0x2de
00000000`004fa090 00007fff`b6704956 : 00000000`ffffffff 00000000`02d49160 00000000`004fa160 00000000`02d8d150 : combase!ClassicSTAThreadWaitForCall+0xbb
00000000`004fa100 00007fff`b672d143 : 00000000`02d49160 00007fff`b7dc79e0 00000000`00000000 00000000`02d49160 : combase!CSyncClientCall::SendReceive2+0x9d6
00000000`004fa600 00007fff`b674099b : 00000000`00000003 00000000`02d82460 00000000`02d49160 00007fff`b6720c84 : combase!ClassicSTAThreadSendReceive+0xa3
00000000`004fa730 00007fff`b672c494 : 00000000`02d7ec38 00000000`00000007 00000000`00000001 00000000`00000001 : combase!CSyncClientCall::SendReceive+0x18b
00000000`004fa960 00007fff`b677998e : 00000000`004fab80 00000000`004fb120 00000000`00000000 00000000`004fb120 : combase!CClientChannel::SendReceive+0x84
00000000`004fa9d0 00007fff`b7e4fd84 : 00000000`004fadb0 00000000`00000000 00000000`00000000 00000000`004fb120 : combase!NdrExtpProxySendReceive+0x4e
00000000`004faa00 00007fff`b6775458 : 00007fff`3f4beb20 00000000`004fb150 ffffffff`fffffffe 00000000`61635ee8 : rpcrt4!NdrpClientCall3+0x3a4
00000000`004fad70 00007fff`b67eb902 : 00000000`027fed98 00000000`004fb1d8 00000000`004fb200 00000000`004fb390 : combase!ObjectStublessClient+0x138
00000000`004fb100 00007fff`263a2fa9 : 00000000`02d7ec38 00000000`004fb180 00000000`00000091 00000000`004fb140 : combase!ObjectStubless+0x42
00000000`004fb150 00007ff6`b27aa185 : 00000000`00000000 00000000`004fb1d8 00000000`615785b0 00000000`02fe6070 : UICommon!CVirtualBox::GetVersion+0x59
00000000`004fb1b0 00000000`61495a79 : 00000000`027ef880 00000000`02fd2d20 00000000`02fcce20 00000000`02fd2d20 : VirtualBox!TrustedMain+0x8ad5
00000000`004fb290 00000000`60d65412 : 00000000`027efd40 00000000`0271aec0 00000000`027ef880 00000000`03019ac0 : Qt5CoreVBox!QObject::event+0xc9
00000000`004fb400 00000000`60d6a7bb : 00000000`023ea2e0 00000000`004fb530 00000000`03019ac0 00000000`00000000 : Qt5WidgetsVBox!QApplicationPrivate::notify_helper+0x112
00000000`004fb430 00000000`61475038 : 00000000`004ff490 00000000`023ea2e0 00000000`03019ac0 00000000`027ef800 : Qt5WidgetsVBox!QApplication::notify+0x1c4b
00000000`004fbb20 00000000`614753d1 : 00000000`03019ac0 00000000`03019a60 ffffffff`ffffff00 00000000`023ea2e0 : Qt5CoreVBox!QCoreApplication::notifyInternal2+0xa8
00000000`004fbb80 00007fff`3f5bcb2f : 00000000`023ea308 00000000`00000000 00000000`027ef640 00000000`004fbc30 : Qt5CoreVBox!QCoreApplicationPrivate::sendPostedEvents+0x231
00000000`004fbc30 00000000`614bd362 : 00000000`00000401 00000000`00000000 00000000`004fbce9 00000000`00000000 : qwindows!qt_plugin_instance+0x268f
00000000`004fbc60 00007fff`b735e7e8 : 00000000`00000001 00000000`004fbdf4 00000000`00000000 00000000`80000012 : Qt5CoreVBox!QEventDispatcherWin32::registerEventNotifier+0x532
00000000`004fbd50 00007fff`b735e229 : 00000000`00003dff 00000000`614bcfc0 00000000`00160d1c 00000000`00000401 : user32!UserCallWinProcCheckWow+0x2f8
00000000`004fbee0 00000000`614bed14 : 00000000`614bcfc0 00000000`027ef601 00000000`00000000 00000000`00000000 : user32!DispatchMessageWorker+0x249
00000000`004fbf60 00007fff`3f5bcb09 : 00000000`027ef640 00000000`00000024 00000000`004ff301 00000000`004ff300 : Qt5CoreVBox!QEventDispatcherWin32::processEvents+0x494
00000000`004ff2b0 00000000`6147205d : 00000000`027efd40 00000000`00000014 00000000`023ea2e0 00000000`027f85a0 : qwindows!qt_plugin_instance+0x2669
00000000`004ff2e0 00000000`61475e52 : 00000000`023efae0 00000000`00000000 00000000`023ea2e0 00000000`02303341 : Qt5CoreVBox!QEventLoop::exec+0x1cd
00000000`004ff360 00007ff6`b27a19e5 : 00000000`00000001 00000000`00000001 00000000`02303341 00000000`00000009 : Qt5CoreVBox!QCoreApplication::exec+0x152
00000000`004ff3d0 00007ff6`b27a1c81 : 00000000`00000001 00000000`00a880c0 00000000`00000000 00007fff`b82347b1 : VirtualBox!TrustedMain+0x335
00000000`004ff610 00007ff6`b28985ce : 00000000`00000001 00000000`00a881c0 00000000`00000000 00000000`00a880c0 : VirtualBox!TrustedMain+0x5d1
00000000`004ff6b0 00007ff6`b2896907 : 00000000`005039c4 00000000`00000000 00000000`00000000 00000000`00000000 : VirtualBox!TrustedMain+0xf6f1e
00000000`004ff730 00007fff`b8077034 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : VirtualBox!TrustedMain+0xf5257
00000000`004ff7e0 00007fff`b8262651 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : kernel32!BaseThreadInitThunk+0x14
00000000`004ff810 00000000`00000000 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : ntdll!RtlUserThreadStart+0x21


THREAD_SHA1_HASH_MOD_FUNC:  9d2090dc3709b14b4102aa77ed02b6f35ae1bfb2

THREAD_SHA1_HASH_MOD_FUNC_OFFSET:  c3edc6b6a6c9a6952d68b9bc3ca54986bf0cefaa

THREAD_SHA1_HASH_MOD:  838d5827d3d3c48cbd82674a2e0e7da4368e0351

FOLLOWUP_IP: 
Qt5GuiVBox!QRasterPaintEngine::transformChanged+1e
00007fff`25d9384e 8388b803000040  or      dword ptr [rax+3B8h],40h

FAULT_INSTR_CODE:  3b88883

SYMBOL_STACK_INDEX:  0

SYMBOL_NAME:  Qt5GuiVBox!QRasterPaintEngine::transformChanged+1e

FOLLOWUP_NAME:  MachineOwner

MODULE_NAME: Qt5GuiVBox

IMAGE_NAME:  Qt5GuiVBox.dll

DEBUG_FLR_IMAGE_TIMESTAMP:  58e261e1

STACK_COMMAND:  ~0s ; .ecxr ; kb

BUCKET_ID:  FATAL_USER_CALLBACK_EXCEPTION_Qt5GuiVBox!QRasterPaintEngine::transformChanged+1e

FAILURE_EXCEPTION_CODE:  c000041d

FAILURE_IMAGE_NAME:  Qt5GuiVBox.dll

FAILURE_MODULE_NAME:  Qt5GuiVBox

FAILURE_FUNCTION_NAME:  QRasterPaintEngine::transformChanged

FAILURE_PROBLEM_CLASS:  FATAL_USER_CALLBACK_EXCEPTION

FAILURE_SYMBOL_NAME:  Qt5GuiVBox.dll!QRasterPaintEngine::transformChanged

FAILURE_BUCKET_ID:  FATAL_USER_CALLBACK_EXCEPTION_c000041d_Qt5GuiVBox.dll!QRasterPaintEngine::transformChanged

TARGET_TIME:  2021-11-13T18:23:33.000Z

OSBUILD:  19042

OSSERVICEPACK:  1348

SERVICEPACK_NUMBER: 0

OS_REVISION: 0

OSPLATFORM_TYPE:  x64

OSNAME:  Windows 10

OSEDITION:  Windows 10 WinNt SingleUserTS

USER_LCID:  0

OSBUILD_TIMESTAMP:  2000-02-23 00:01:56

BUILDDATESTAMP_STR:  191206-1406

BUILDLAB_STR:  vb_release

BUILDOSVER_STR:  10.0.19041.1.amd64fre.vb_release.191206-1406

ANALYSIS_SESSION_ELAPSED_TIME:  57d0

ANALYSIS_SOURCE:  UM

FAILURE_ID_HASH_STRING:  um:fatal_user_callback_exception_c000041d_qt5guivbox.dll!qrasterpaintengine::transformchanged

---------

[gombara]

I think there is something specific to your setup causing this. Or we would be drowning bug reports. A quick try with 6.1.28 on Windows did not crash for me either. What else I can try to reproduce the problem?

[fth0]

FWIW, two users have reported the same issue in ​VirtualBox crashes half the time I use it (fault in Qt5GuiVBox.dll).

[0xc0000022]

You probably aren't drowning in reports because Oracle makes it a pain to post reports to begin with. But nothing is unusual about my setup that I can think of that would cause a crash in a specific DLL for a specific program.