Index: /trunk/src/VBox/HostDrivers/Support/win/SUPR3HardenedMain-win.cpp
===================================================================
--- /trunk/src/VBox/HostDrivers/Support/win/SUPR3HardenedMain-win.cpp	(revision 59810)
+++ /trunk/src/VBox/HostDrivers/Support/win/SUPR3HardenedMain-win.cpp	(revision 59811)
@@ -4215,5 +4215,5 @@
             {
                 memcpy(pszErrorInfo, pszPrefix, cchPrefix);
-                pszErrorInfo[RT_MIN(cbErrorInfo - 1, Ios.Information)] = '\0';
+                pszErrorInfo[RT_MIN(cbErrorInfo - 1, cchPrefix + Ios.Information)] = '\0';
                 SUP_DPRINTF(("supR3HardenedWinReadErrorInfoDevice: '%s'", &pszErrorInfo[cchPrefix]));
             }