I updated to Win 10 from 8.1 I started go get many issues with CS and the menu. My Windows Menu cant be opened, same with calender and Cortana, I tried literally every fix (powershell, cmd, losing/restarting and making a local account) - nothing helped.
Also my CS fucked up, I have 250-300 fps but var just goes crazy so the game feels laggy.
I reinstalled CS, updated my drivers.

Please help.

I didn't find the right solution from the Internet.

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