I have been trying to install a tp-link TLwn821n to my friends windows 8 computer.
It seems to install ok and then asks me to reboot the computer. upon reboot the drivers are not installed.
The message reads 'windows found driver software for your device but encountered an error when attempting to install it, the data is invalid'
I have installed this stick to my windows 8 computer and my windows 8 laptop with no problem at all.
I have taken the latest drivers from the website.

Has anyone got a fix or know what the problem is,

Many thanks