How to resolve 0xc000021a error in dual boot pc

[shashanka mouli puligadda]

I have dual booted pc (windows11 originally 10,Ubuntu). It all worked fine till now where windows is booting and it is showing 0xc000021a error. Ubuntu is working fine btw. I had a previous issue of wifi,bluetooth drivers stopping abruptly so I bought tp link TL-WN725N a new wifi driver. I have tried multiple solutions found online but none worked including resetting my pc(just ther windows part) while trying some solution it mentioned c:/boot doesn't exist when my windows runs in disk c. What should I do now

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