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thank you so much I have reinstalled windows10 1703 No longer use the Registry cleanup feature before CCleaner solves the problem

Thank you so much for replying. I think it might not be the problem mentioned in this link.I looked at my context menu is normal. Is your file Explorer right-click menu Normal?

Of course I know, run as an admin Although English is not my mother tongue but normal communication is still OK. Because my system is Chinese version, so the prompt message is Chinese, meaning is no problem

DISM doesn't have an error.I run it as an administrator. I also tried Sfc/scannow, and it didn't have an error too.

I'm sorry, I made a mistake. I tried this, but it doesn't work.

The problem is that the File Explorer menu disappears, and clicking all items cannot be opened. Last year when I reinstalled Windows, there was almost no other software installed except CCleaner. Cleaned several times with CCleaner's cleaner and registry features, and then the problem shown above. Previous version of Windows is 1607 and I thought it was a system problem, and it was reinstalled again. Until recently the frequent use of Ccleanner cleanup, this problem has arisen. Currently my version of Windows is 1703.I tried to go to Microsoft community feedback but no results. Sorry I am Chinese, English is not good, with the help of translation software I want to know if it's ccleaner caused and how to fix it. Thank you for your help. 7.16--- There's been a new discovery today. All applications are affected, and all system applications have lost their right menu.