Ctrl Alt Del, Task Manager, Processes
Could be spyware...
Download Ewido Anti-Spyware from http://www.ewido.net/en/download/
1. Load Ewido and then click the Update tab at the top. Under Manual Update click Start update.
2. After the update finishes (the status bar at the bottom will display "Update successful")
3. Click on the Scanner tab at the top and then click on Complete System Scan
4. Ewido will list any infections found on the left, when the scan has finished, it will automatically set the recommended action. Click the Apply all actions button. Ewido will then display "All actions have been applied" on the right.