Keyboard stops responding and can't start new programs or restart

Hello, I'm new to these forums. Just wanted to find somewhere to post this and see if anyone has an answer since i couldn't find a solution to the problem by googling...

This problem happens apparently at random. i could be away from my computer or i can be using it. At some point the keyboard just stop responding. i can't type, and the num-lock, scroll-lock, caps-lock buttons don't turn on or off their respective lights. The lights on the keyboard are still on, btw. As my mouse is still working fine, i can browse the internet and open and close folders, but trying to open a new program or close an open one doesn't work. Trying to right click the taskbar, i see an option to open the task manager but once clicked, it won't open either. trying to restart or turn off the computer just gets it stuck on the "logging off" screen forever until i manually turn off my computer on the button at the front. once restarted everything works fine until the problem randomly happens again.
i tried switching USB ports for the keyboard before and during the problem but that doesn't fix the problem. i tried erasing INFCACHE.1 i tried clearing greyed out USB ports in device manager. i tried discharging static from the PC. i tried error checking and clearing from the drive. anything else i could try and do?

I don't have one... Besides, could a faulty keyboard really prevent a computer from closing and prevent programs from opening?

In any case, i'd like to exhaust all free options before i jump ahead to buying new hardware...

linnemeyerhere said:

amitamit2,
Welcome to SF. Is this a wired or wireless keyboard?

It's a wired SteelSeries Merc Stealth Keyboard
And thx for the welcome :)

linnemeyerhere said:

Try another usb port and a re-boot and let me know if it gets better?

Yeah, i wrote in the first post. i tried turning off my PC switching ports and starting again. it happened randomly as usual...