Both Alt keys broken

[SupahBlox]

My alt keys stopped working, but I don't really know when, but I think it was after I modded my GTA San Andreas and then I started playing the game, but it hanged up and I tried to do Ctrl+Alt+Delete but noting happened. I tried to do Alt+Tab, but nothing happened, instead it just switched the selection from New game to Load game, which tells me that the alt key doesn't work but only Tab does. I started to test stuff like Alt+123 but instead it just typed 123. I remapped it and tried to switch the RWindow button and RAlt and also the same with LAlt and LWindow, nothing, instead, both the buttons didn't work. I tried to troubleshoot, nothing, I tried personalize, nothing, I tried to research about AltGr (Which is the combination of Alt and Ctrl) but I don't think that can help, I tried on-screen keyboard, the alt key doesn't respond. I don't think its the keyboard or any particle that got between it since I just cleaned it and never ate in front of it and I also tried remapping but both the button that I switched functions with didn't worked so please please help 'cause if you use Alt+Tab you'll know that it's so frustrating to be not able to do that (I think that sentence was right).
 

[Spoiler]

Did you try another keyboard?

[Tricolor]

Check out the hardware section in Control panel and ensure you have not locked any keys.

[patio]

Check out the hardware section in Control panel and ensure you have not locked any keys.

You need to remove the Ad in your sig...

We don't advertise here.

[patio]

I took the liberty of removing it since no response.

patio.