Usually i play CSGO without any problems, until recently when i changed screen and then back to my old screen again. I know a screen doesnt cause lag but maybe it could´ve changed some settings automatically? I have no issues on matchmaking servers or a few community servers, but on most community servers i have 100+ ping (i have played on these specific servers many times without high ping)
If anyone has an idea how to fix this, please help.
I had the same problem actually, what helped me is:
1. Open cmd.exe
2. Type in 'ipconfig /release' without the quotes. (WARNING(1): That will cut your internet until step 3.; WARNING(2): If it didn't help without CS:GO on, turn it on and get on the server, then try it [i have no idea why that helped in my case])
3. After it's done, type in 'ipconfig /renew' without the quotes.