id summary reporter owner description type status component version resolution keywords cc guest host 14978 Error In supR3HardNtChildWaitFor Nils "Hello, I get this error on startup since 5.0.8 (also on .10 and .12). Key Host Info: - Lenovo x250 16GB RAM, 512 SSD - Host win7 (latest patches some win10 upgrade stuff suppressed) - guests: debian (but probably irrelevant) - avira antivir antivirus - comodo firewall When I start vbox, after a while I get the following error: --------------------------- VirtualBox - Error In supR3HardNtChildWaitFor Timed out after 60001 ms waiting for child request #1 (CloseEvents). (rc=258) where: supR3HardNtChildWaitFor what: 5 Unknown Status 258 (0x102) (258) - Unknown Status 258 (0x102) --------------------------- If I do not close it and wait a while (another minute or so) I get it again, and then the guest opens just fine. See this bug description: https://forums.virtualbox.org/viewtopic.php?t=64111&f=6#p301426 (way back from Oct 2014 and 4.3.18) ...it is essentially this. If I close any of the dialogs, then the guest does not open. Attached are the logs (from 5.0.10, I can recreate with .12 if desired) and a screenshot of the errors. The logs appear normal. Thanks Nils " defect reopened other VirtualBox 5.0.12 Linux Windows