If you tried reset but no luck, I think it is faulty totally.

Andreas, you may try different wireless channels and change channel width to 20MHz for a try. You'd better figure out wireless connection drops with 2.4GHz network or 5GHz network.

As I know, we cannot configure bandwidth control (IP Qos) on TD-W8901G.

Log into web interface 192.168.0.1. Go to Wireless/Wireless settings, make sure enable SSID broadcast is checked like enable wireless router radio. If yes to both, try different channels.

John, you're right. Here is compatibility list. http://www.tp-link.com/en/support/3g-comp-list/?model=TL-MR3420 I think you can try to upgrade the firmware to be latest first, reset it and...

Hi Tonmoy, TL-WN725N is not listed in their compatibility list. http://www.tp-link.com/common/Promo/en/win8compatibility/ So I think is not compatible with Windows 8. Maybe they will update it in the...