Windows 10: need help

since 2 month ago my PC always have problems after installed new windows.
for example:
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

:)

 

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Hi OOJ and welcome to Tenforums.
You might want to do a repair install using an in-place upgrade.
Repair Install Windows 10 with an In-place Upgrade - Windows 10 Forums
I would download the ISO from MSTechBench to your desktop, right-click it and select MOUNT, then run setup.exe to do the repair install. Good luck and let us know how it goes.