I accidentally pressed some kind of hot key and now computer is working strangely

[Microsoft Windows]

I have pressed a hot key that I don't know while playing and now my computer works completely different:Caps lock is invertedIf I press lmb on the opened file on taskbar, it just opens new fileI can't scroll in browser using scroll button on mouseSome hot keys are not working (for ex. Ctrl c, Ctrl v)On desktop when I'm pressing lmb on any file, it selected all files from random file, to the file which I pressed onHow do I fix it?

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