I tried to delete the trusted site again so i went into "tools, internet options, security and trusted sites" and there was nothing in there!!
Any other way i can find it to delete it??
I also tested the problem again and it is still happening...I tried to reboot the computer within the 20 minutes to see what error messages i got but the only one that came up yesterday was "lsass.exe" "Failed to initialise"..
Any other ideas??
Thanks very much for your help :-)