Hi, TP-Link routers are not good to connect a USB printer. They require a special tool on each PC. I didn't succeed to use mine simply as I did with the DD-WRT firmware...

Hi, It's a well know issue with all the TP-Link routers. The MAC addresses are crazy because the TP-Link programmers are weak...

Hi, Are you using a "clean" PC? I mean without software firewall, antivirus web security, browser history/cookies, etc.

Hi, Did you do a reset with the back button? Are you using the last firmware?

Hi, It's simple, don't use the WAN port. Consequently, the WAN parameter are useless. If you plug your modem-routeur to one of the LAN port, and you'll have an AP. If you want a wireless bridge, use...

Did you try an hard reset on the back button?