Hi, I have the same problem and I think I have it fixed. Searched everything on the internet, funny how many people have this exact problem.
For me it was Avast Antivirus (AVG also have some problems).
Turning off or disabling modules did nothing. Creating exceptions also without success. Only the complete deinstallation has fixed it. Did it with Revo uninstall, but no idea if that was necessary.
Here are some more possibilities:
Turn off Nvdia ingame overlay
Disable XMP in Bios <-- Have no idea about it, better inform yourself beforehand!
Lobby FPS ingame to 40
Turn off Nvidia Shadowplay
Create exception in firewall
Update graphics driver
Try fullscreen and borderless
Right click Tarkov.exe / under compatibility "Fullscreen optimizations" set check mark
Start the game as admin
Increase Windows page size file
Limit game FPS to 60 <-- Fuck that, i would never do it 
The most likely ones are:
XMP
Change Antivir something else (My solution)
Disable Fullscreen optimazions
Pagefile Size
I wouldn't have done anything to the XMP settings in Bios, that's going too far for me. Even to change antivirus was an overcoming.
I hope some of this helps you!
