Go to Control Panel and then Device Manager and locate the Display Adapter and look if you have an entry for 'High Definition Audio Controller'
Select your video card and Right Click for PROPERTIES. Look for the 'Location' entry and note the BUS and FUNCTION entries:
Do the same for the 'High Definition Audio Controller'
IF the BUS used is identical (between the video card and the HD Audio Controller) BUT the FUNCTION is different (PCI BUS 4, Function 0 and PCI BUS 4 Function 1):
'DISABLE' the 'High Definition Audio Controller'
Your WOT client would be much more stable. It might still crash but not as often. The problem stems from sharing the same bus (IRQ in fact) hence they interrupt each other. The reason is most video cards today do have their own audio device built-in for HDMI output.
UPDATE: For newer video cards specially nVidia the location of the HD Audio Controller has changed.
It is no longer under the 'Sound,Video and Game Controllers section' (although sometimes it is still listed there, you cannot disable it there anymore).
You must now go to the System Devices section to DISABLE it.
UPDATE II: I would also check the python log. If your python log contains a lot of missing file error, inability to read .pyc files and countless CTD (Crash to Desktop) during the game as well and have PATCH Launcher errors like "Critical Errors' , then you might have a Hard Drive problem. You might not notice this with other programs but with WOT you will. Sadly the solution for this is a brand new hard drive. This I know from experience as well.
Please comment here and give tips and observation if this helped you.
Edit: This has also been tested by people with ATI video card and the same fix works. You just might have a different designation for your 'HD audio controller'.
You can also try to DISABLE, "Data Execution Prevention':
Edited by X32Wright, May 03 2013 - 21:36.