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Hardware Version : Not Clear

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Hi, i've just purchased the TP-LINK Wireless N USB Adapter (TL-WN821N) As i was a huge step up from my previous USB adapter the TL-WN821N has also caused me alot of headache and had i not stumbled on this video: https://www.youtube.com/watch?v=Y0OBRHJwVyg i would've scratched my head still. I couldn't for the love of god understand why every Steam game i tried just sent me back to the desktop after i couple of minutes/seconds. It turned out that it was the file TWCU.exe, which is basically the software that came along with the TL-WN821N, that caused the problem.. I tried everything but after watching the video i ended up just uninstalling all the TP-LINK software and now i use my old Deltaco USB Adapter again,. It's not as fast as the TL-WN821N but atleast i get to play my games without them crashing/minimising back to the desktop. Is there a way around this problem where i could use my new "TP-LINK Wireless N USB Adapter (TL-WN821N)" again or is i just better to return it to the computer shop whwre i bought it and get a different brand? I would appreciate some advice in this matter. And for you still struggling with how to fix this problem with the TL-WN821N, just watch the video.

Sincerely
Isak from Sweden