step 1.
- Type in console launch -insecure then confirm.
(library/csgo properties/set launch option)
- Repeat and remove -insecure from the console and press ok
(check if the problem persists)
step 2.
- exit steam
- click start Run (Windows Key + R) RUN AS ADMINISTRATOR
- Type this command:
"C:\Program Files (x86)\Steam\bin\SteamService.exe" /repair
this may take a few minutes.
- Launch Steam and test the issue again.
step 3.
- open Command Prompt as an Administrator
- paste this commands and click enter
- bcdedit.exe /set {current} nx AlwaysOn
- bcdedit /deletevalue nointegritychecks
- bcdedit /deletevalue loadoptions
- bcdedit /debug off
- bcdedit /deletevalue nx
Click OK and you need to restart PC now.
you can also try to end process "explorer.exe"
in task manager and start new with admin privileges.