Reboot and see how the pc is first.
Here is a rundown for a repair; http://www.michaelstevenstech.com/XPrepairinstall.htm#RI
Remember that you will lose any service packs and security updates!
Before doing that and as a last chance, do an online scan to see what comes up;
Please use the Internet Explorer browser (or FireFox with IETab), and do an online scan with Kaspersky Online Scanner
Note: If you have used this particular scanner before, you MAY HAVE TO UNINSTALL the program through Add/Remove Programs before downloading the new ActiveX component
Click Yes, when prompted to install its ActiveX component.
(Note.. for Internet Explorer 7 users: If at any time you have trouble with the "Accept" button of the license, click on the "Zoom" tool located at the bottom right of the IE window and set the zoom to 75 %. Once the license has been accepted, reset to 100%.)
The program launches and downloads the latest definition files.Once the files are downloaded click on Next
Click on Scan Settings and configure as follows: Scan using the following Anti-Virus database:Extended
Scan Options:Scan Archives
Scan Mail Bases
Click OK and, under select a target to scan, select My Computer
When the scan is done, in the Scan is completed window (below), any infection is displayed.
There is no option to clean/disinfect, however, we need to analyze the information on the report.
To obtain the report:
Click on:Save Report As (above - red blinking arrow)
Next, in the Save as prompt, Save in area, select: Desktop
In the File name area, use KScan, or something similar
In Save as type, click the drop arrow and select: Text file [*.txt]
Then, click: Save
Please post the Kaspersky Online Scanner Report in your reply.