Vista - IE not browsing ONLINE

i have vista running ie 7(7.0.6001.1000) and for some reason i can no longer
browse the internet. I am on line though a my other computer can 'see' this
one on my network and my msn messenger signs in. everything reports no
problems but it wont browse., I have used msconfig and tried disable services
then restart, still not work, disable startup, still not working.
In the options i have reset IE ut not working still. I have firefox also on
the pc, this cant browse either. If i start in safe mode with networking, it
works!
I have removed all antivirus software and firewall and disabled the windows
firewall also.
i have also done a system restore but again, not working.
i have a valid ip address and the connetion manager on the laptop reports no
problems. HOWEVER, the 'Diagnose connecton problems' in IE says, "WINDOWS
FOUND A PROBLEM THAT CANNOT BE REPAIRED AUTOMATICALLY"
please help
thanks
Bryan