Millisecond Forums

No clue then -- what does the technical log file say (open Inquisit Lab, then go to Tools -> View Log File...)?

That didn't work either.

If you are running things in a VM, make sure you enable hardware 3D acceleration in the VM's settings.

I've created a clean install of windows 7 x64 on a virtual machine and tried running the web demo tasks, also tried running the tasks inside inquisit lab, in both i got an APPCRASH windows message saying the inquisit launcher crashed.

I don't know then. You can additionally try updating / reinstalling the display drivers as well as DirectX. Another option is to use your system's restore points (if any are available) to go back to a previous system state when things were still working and move on from there (i.e. re-add the apps you listed one at a time) to identify the culprit.

I've already done it before, didn't make any difference.

Try removing or disabling any background processes belonging to Babylon and see if that makes a difference.

I've closed down all unnecessary applications. 

Well, sounds like *something* on that machine is throwing things off (the fact this happens both under Lab and Web underscores that point). Potential culprits are things like wonky graphics card drivers (check if these have been updated in the past 3 weeks) or any other background application that hooks into the display system (e.g. video conferencing software, remote administration / screen sharing software, etc.). To troubleshoot, review the software installations and updates for the relevant time period and disable any non-essential applications and processes running in the background. Let us know what you find.

Nothing special was done. Practically, didn't install anything.