The problem seems to have reared its ugly head again, despite my changing the IP address of the extender. Any thoughts?

Kane wrote Wow... In the end of the flat, your PC connected to the extender can access the internet now ? Everything seems to be working now, and yes it can...see below How did you install extender ?...

Region : UnitedKingdom Model : TL-WA830RE Hardware Version : V1 Firmware Version : as shipped ISP : TalkTalk Business Hello, I have a TP-link TD-W8961ND 300mbps wireless router to distribute our ADSL...