Sometimes you will find difficulties accessing system information where you will find Windows management instrumentation software is removed or missing. In that case you can do following steps to restore it.
- go to cmd as administrator
- type net stop winmgmt ( it will stop the winmgmt service with other related service as well )
- Then keeping the cmd open go to this folder C:\Windows\System32\wbem
- rename existing repository folder with repository_old
- then going back to cmd run this command again net start winmgmt
- after the succesful execution of command restart the windows.
The post is distilled following the link below - https://answers.microsoft.com/en-us/windows/forum/windows_7-performance/cannot-access-the-windows-management/8849f190-cf4b-e011-8dfc-68b599b31bf5