Vista - Problem with Windows live programs

Basically my problem is after logging onto windows live mail I cannot then go back to looking at websites.Its as if the connection is not there although programs will still download and I can still use messenger so the connection is still there.Just no webpages.I then have to reboot,then all works fine until I open up windows live mail again,then it does it all over again.I have tried downloading all the programs one by one but it still does this if I only have messenger,or only live mail installed.If I uninstall all windows live programs (windows essentials) then everything works fine.This is also happening on my mums vista.I have run every scan going and machine is clean.Any ideas anyone,as I dont really wanna do a clean install if I can possibly avoid it.Thanks in advance for any help.