K90 Not recognized

Yes i know there are a couple of threads about the k90 but none of the "solutions" worked for me..

So i bought my k90 like 4 hours ago, i plugged it in and it worked, then i wanted to update it with the "k90 firmware update" from the official website. After that nothing works my keyboard doesnt light up and its not recognized by ANY computers ( tried 3 windows and one mac) :(

I tryed a lot of things from the forums but nothing worked for me..

System Specs:

Mobo: Asus Sabertooth Z77

CPU: Intel Core i5 3570k

GPU: Asus GTX680 Direct CU II

Power supply: Corsair AX850

i think those are the important ones :)

and yes i already reinstalled the USB and chipset Drivers didnt do anything.

Thanks alot :)

UPdate:

A couple minutes ago something strange happened.. i was playing around with the drivers( reinstalled and uninstalled unplugged etc.) and when i a bit later looked at the keyboard there where 3 keys glowing "MR" "M2" and M3" no keys worked they were just glowing.. i unplugged and connected it again and now nothing works.. really strange :confused:

i hope someone can hope me as fast as possible.. i cant play crysis with a DELL keyboard :(:

Try this and see if it helps.

http://forum.corsair.com/v3/showthread.php?t=104856

If it doesn't contact your seller and ask if they can replace the K90 for you. If not, request an RMA to replace it.

thank you for your time but unfortanely my keyboard doesnt show up as KBD BOOT LOADER and NO Keys work.. i just tried it on the "unknown device" or something.. and after a couple of hours i could get it to recognize it as "Corsair gaming keyboard but i could not get it to work :[pouts: i hope my seller can replace it because i dont want to wait months for the keyboard.. i mean its ****ing brand new and doesnt work.. its like the h100 i had.. i think ill stay away from corsair products in the future... well except for ram ;):

Thanks