I have a bit of advice.
Running a system that's totally out of date, not using a firewall and not using any anti-virus,
gives you a totally trashed system.
Reformat your Hard Drive and start from scratch.
Before you start over, download a good AV program like avast! and a Firewall program like Zone Alarm.
Put these two programs on a CD
Now format your HD and re-install windows, Install your Anti virus and Firewall programs and then
log onto the net and update your system.
Once that's done, let us know if you still have the same problems. I highly doubt you will.