lucy24 - 9:32 pm on Sep 10, 2012 (gmt 0)
Can I assume you've tried the obvious tests that you do whenever you suspect a router issue? Plug the internet cable directly into the computer, bypassing the router. Can't do it with the tablet of course-- but if it never happens when you're not using the router, then you've got a pretty strong diagnosis. Does the problem continue after you've re-installed the router software?