Alt+Tab shortcut won't work on Windows 11 Lenovo Laptop

EDIT SOLUTION: After noticing my Windows key was not working as well, I have just been able to google the solution myself. There was a failed launching process of another old school game stuck in my task manager and it was overwriting my shortcuts. I have closed the game and now everything works again.

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Hi everyone!

Windows 11 Home, Lenovo Legion 5 15ACH6H.

The ALT+TAB shortcut doesn't work anywhere (within applications or on desktop). The ALT and TAB key do work when used alone, so it's not a mechanical issue. Example: TAB does tab through options in any application. In firefox ALT does open the menu bar. More specifically, it opens the menu bar when I let go of ALT, not when I press or hold it.

The multitasking settings are set to show the most recent 3 tabs when using ALT+TAB.

I'm not sure whether this is relevant, but I have recently installed Might and Magic 8 from Good Old Games and wasn't able to ALT+TAB out of the gameplay. I chalked it up to the game being old until I noticed I can't ALT+TAB on my desktop either. I'm not sure whether the installation could have made some changes for compatability.

I just noticed, the Windows key doesn't seem to work either. Other shortcuts like Ctrl+whatever do work.