Hello Caroline and Welcome to Malwarebytes.org
You really should try to follow the directions here which will help to ensure your system is clean.
Please read and follow the instructions provided here:
Pre- HJT Post InstructionsWhen ready please post your logs here:
Malware Removal - HijackThis LogsSomeone will be happy to assist you further with cleaning your system.
During this scan and cleanup process you should not install any other software unless requested to do so.
If all you want to do is clean up the System Restore then you can do this on XP.
Disable and Enable System Restore-WINDOWS XP
This is a good time to clear your existing system restore points and establish a new clean restore point:
Turn off System Restore
- On the Desktop, right-click My Computer.
- Click Properties.
- Click the System Restore tab.
- Check Turn off System Restore.
- Click Apply, and then click OK.
- Reboot.
Turn ON System Restore
- On the Desktop, right-click My Computer.
- Click Properties.
- Click the System Restore tab.
- UN-Check *Turn off System Restore*.
- Click Apply, and then click OK.
This will remove all restore points except the new one you just created.