Hi,
Run a complete virus scan on your compuer.
Microsoft Safety Scanner
http://www.microsoft.com/security/scanner/en-au/default.aspx
Note: The Microsoft Safety Scanner expires 10 days after being downloaded. To rerun a scan with the latest anti-malware definitions, download and run the Microsoft Safety Scanner again. It also performs check disk and you may lose amount of data.
Also see:
When you run an .exe file on a Windows Vista-based or Windows 7-based computer, the file may start a different program