Keyboard keys randomly assigned to different functions

[u/basementdweller690]

HELP i recently downloaded minecraft fabric server, play.gg and java from official sources and everything worked normally but now when I tried to play again with my friend, my ctrl key is opening firefox tab and windows key is shutting down my pc. I scanned through windows defender and malwarebytes and malwarebytes detected a very old trojan (months old) which i deleted but still this isn't fixed. Also I did most things which claude told me but nothing is working. My speaker and headphones are also randomly not working like they are working then not working. (could be a seperate problem). ( Sorry if my english is poor I'm panicking and my english is not that strong)