Hello.
Please download and run Shoot the Messenger:
http://www.grc.com/files/shootthemessenger.exe
This is a very simple app that disables the Windows Messenger utility, which is usually unecessary and leaves you vulnerable to possible popup attacks.
Next download and run RegSupremePro:
Macecraft Software - System Maintenance and Registry Cleaning made easy
When you run it, itt will want to make a backup of your cache. Let it.
Click on the Registry Cleaner tab, and choose Aggressive. When it has finished, click on Select and choose All. Click on Fix, and let it fix everything that it finds.
Restart your computer.
Then run Panda ActiveScan.
Once you are on the Panda site click the Scan your PC button
A new window will open...click the Check Now button
Enter your Country
Enter your State/Province
Enter your e-mail address and click send
Select either Home User or Company
Click the big Scan Now button
If it wants to install an ActiveX component allow it
It will start downloading the files it requires for the scan (Note: It may take a couple of minutes)
When download is complete, click on My Computer to start the scan
When the scan completes, if anything malicious is detected, click the See Report button, then Save Report and save it to a convenient location. Post the contents of the ActiveScan report.