Is there any anti-virus software on your computer ? Maybe you can have a try to uninstall the anti-virus software and then manually install the driver and later reinstall your anti-virus software. Hope this helps!

You may try a different computer to install this card and see how it going...

Thanks for that, its running Avast free antivirus, will try that and get back to you.

Have uninstalled Avast, rebooted, installed the drivers again, and it still loses the driver on a shutdown but not a restart. How very odd. Will try what vivian suggested and install in a different computer.

I have a similar problem. I have windows 8. So no drivers were there. It installed it automatically but with a different make. I tried creating a adhoc for LAN internet sharing but it would connect for just a minute or 2 wirelessly to my devices and would vanish.
I tried a windows 7 computer with stock drivers. It was not connecting and moreover when I restarted the computer came into a blue screen dumping memory loop. Won't come out of it until I removed this hardware.
Any suggestions ? Everyone recommended me to go with Dlink, but don't know why I bought this TP link. I hope my money is in good hands.

I'm having the EXACT same problem. Any solution from TP-Link??? Thanks in advance.

Checked TP-LINK website~ TL-WN350G is a discontinued product. Guessing they won't keep an eye on it again~
anyway, it's just my personal opinion. You'd better email to support@tp-link.com.