I had a similar problem. I went to the control panel, unistalled my windows service packs and unistalled my microsoft essentials security. I then downloaded a new antivirus (AVG)and ran that. It found 4 items. I updated my microsoft to service pack 3 once again and everything seems to be working. There is no detection of a virus any longer and my internet works once again. Previously, my internet would work for a few minutes then lock-up.
Let me know if this helps.
I have contracted something that is blocking internet browser access on my Windows XP (service pack 3) Dell Inspiron laptop. For example, IE8 automatically shuts down 3 seconds after the initial display; Chrome starts up but doesn't display any web pages; Firefox immediately crashes upon start up.
I have already executed Malwarebytes (full scan) in Safe mode.
Any suggestions for fixing this problem would be appreciated.