[Q] Can't connect to pc

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http://forum.xda-developers.com – Hello! I have a huge problem with my tf700t, Windows 8 won't recognise my device. In device manger it just says: Unknown device. I'v tried to install the usb drivers manualy but it won't work... I just get "can not find driver software for this device" the error device mangere gives me is "Windows has stopped this device because it has reported problems. (Code 43)" I also tired to install asus sync.... I'm running newest frimware form asus (4.2.1) Before i installet the 4.2.1 from asus I was running offical cm 10.1 and everything was working. Then i decided to go back (HowTos)