when you disconnect wifi, please refer to the following link to check whether the driver is working or not.: http://www.tp-link.com/en/article/?faqid=284
If it's working properly, you may try to set a fixed channel on your wireless router.

Simon wrote

when you disconnect wifi, please refer to the following link to check whether the driver is working or not.: http://www.tp-link.com/en/article/?faqid=284
If it's working properly, you may try to set a fixed channel on your wireless router.

Hi Simon, I have checked its driver's working properly. but the problem's still exist. I am using my friends's wifi not mine.

I tried to re-installed the drivers many times. but it's still remain disconnected.

P.S: my old wireless usb is working perfectly using those Wifi's connections but this new one not.

Thank you Simon.

I need help

sorry my english