Why do Windows applications close spontaneously?

Question

Windows

Hello.
We have Windows 7 Ultimate x64 on Core i5 2500 + 16Gb RAM + GTX760.
Some programs, namely: World of Tanks, Yandex Browser, Punto Switcher, Volume2 and Greylink-x64, spontaneously close without any messages or errors, and apparently close at the same time.
Symantec Endpoint Protection antivirus is an unmanaged client without a server.
Viruses are not visible.
Tell me what to do to identify the cause,

Answer 1

So that absolutely no errors are recorded anywhere, it practically does not happen. Give the events from the error log at the time when the programs spontaneously close.

Answer 2

1. Try turning off your antivirus. Check
2. Start the PC in safe mode, in this case a lot will be disabled, try to check if everything works, then you already know that some program was killing your processes.
3. Reinstall Windows.

Answer 3

How can I see the error log? And what are the signs to look for in it?

Answer 4

Find a boot disk with an antivirus, boot from it, scan the tin. Casper has one.