since 2 month ago my PC always have problems after installed new windows.
1 click right mouse on tab bar and select Task Manager noting open.
2 type any functions cmd and (regedit, msconfig, ...) on W+R nothing open.
3 can't install or run program by Temporary file. for here i can't install all winrar because it will extract to Temporary folder
4 some icon double click mouse it no event, but right click and select run Administrator then it started programs (ok)
i tried with all above problems, i have install windows 7, 8, 10 many many time it all have found problems that said after install no longer time
how clear it, please help me. thanks