This error may be caused by a high load of a videocard.
- Set graphics settings to low:
- Turn unnecessary resource-intensive programs off.
- Turn off vsync in the launcher.
If these steps will not help - try the following:
- Update your graphic card driver. Details can be found in this article;
- Check the settings of the video memory in BIOS;
- Disable desktop composition (Windows 7). To do this, go to the game directory (C:\Program Files (x86)\War Thunder by default), find the aces.exe game file, click on it with the right mouse button -> Properties -> Compatibility -> Disable desktop composition.