< Moving the discussion to Indesign Forums >
What OS are you using? It doesn't sound exactly like the issue we see all the time, but often non-responsiveness is caused by using Win7 with Aero and using font magnification to increase the size of interface text. Check out this KB article to find out if this applies to you.
If that is not your issue - can you use any of the panels? Or is it just the Page panel that is dead?