virtualbox.org

I dont know if AVG uses VT-X. Contacted AVG support, and they recommended using the AVG Product remover to remove all traces of AVG and then re-install. Inserted the registry entry again before removal, just to check Did it! Seems to be settings left over from a previous installation, which is then ...

Use of this registry key is, among others, covered in this article on Linkedin:
https://www.linkedin.com/pulse/20140905 ... d-evil-fun

Problem solved. Caused by AVG Software which activates ifself as debugger for, in this case, virtualbox.exe. This happens when the program is started. This is done in the registry through the key HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Image File Execution Options...

To add to the puzzle: I just installed latest VB on another machine also using AVG. Installed one of the machines from my other installation (new - using disk image already set-up) and it runs like a charm. This PC has not been updated through MS for a while, so I'll persue that direction - at least...

Found the code on Github. Does not seem like an error is expected at this time: (will further check on AVG). /** * Sets up the early process init. * * @param pThis The child process data structure. */ static void supR3HardNtChildSetUpChildInit(PSUPR3HARDNTCHILD pThis) { uintptr_t const uChildExeAddr...

Got your points. I was assuming dll checks were finished due to this in the end of the log: 1908.c84: supR3HardNtEnableThreadCreation: 1908.c84: supR3HardNtDisableThreadCreation: pvLdrInitThunk=0000000076d2a360 pvNtTerminateThread=0000000076d4c260 1908.c84: supR3HardenedWinDoReSpawn(1): New child 23...

This is strange, because it has worked previously. I've tried to disable AVG, and the problem persists. From the log it seems that VB has passed checking the drivers and is starting the VM, but can't write to it's memory. Nothing in AVG logs points at any error either and Virtualbox has been added t...

Sorry, didn't notice it ended up partial. File attached.

This is now happening on ALL my VM's with VirtualBox (5.0.30) when hitting Start. NtWriteVirtualMemory.jpg I haven't been using VB for some months, so there has been several Windows updates since. Vindows 7, SP1, latest updates. AV is AVG Internet Security. Has been working with this previously. Any...