You have the lovsan(blaster) virus. There are many anti-
virus sites that have cleaners on them for this but that
only solves your problem temporarily. If you are still
getting this after the virus has been on the internet for
months than your computer is not configured for safety
while surfing. The Windows Updates site now has a three
step tutorial right on the site instructing you how to
make your computer safer. Activate your firewall in the
control panel\network connections. Use a good Anti-Virus
program. For now you will need to go>start\control
panel\administrative tools\services and scroll down to RPC
and then double click it to open its configuration
windows. Click the recovery tab and make a note of the
settings on all three recovery lines. Now click the drop
down list arrow to the right of each line and
select "restart the service" and then click your way out.
Now this will allow you to remain on the internet long
enough to go and have your computer cleaned at somewhere
like
www.sarc.com . Keep smiling.