Immelmann

i have the Ttesports By Thermaltake keyboard. 20 minutes ago, my windows key worked. now it does absolutely nothing. did some searching and it seems that to try holding Fn +PrntScrn takes you out of game mode back to normal mode so the win key works. well, that did not help. my win key is still not working. i was just sitting here typing, then i went to use win+R and it failed to work. tried ALL the other combo's, nothing. it does not even take me off my desktop. it does absolutely NOTHING now. any solutions?