Thomas writes:

“My computer is already slow. If I download your security scanner, it will probably bring it to its knees.”

The Microsoft Security Scanner is a free downloadable security tool that helps remove viruses, spyware, and other malicious software. If you’re worried about saving space on your hard drive, you can delete the scanner after you run it. If you forget to delete it, the scanner will expire 10 days after you download it.

To rerun a scan with the latest anti-malware definitions, download and run the Microsoft Safety Scanner again.

Note: The Microsoft Safety Scanner is not a replacement for using an anti-virus software program that provides ongoing protection.

For real-time protection that helps to guard your home or small business PCs against viruses, spyware, and other malicious software, download Microsoft Security Essentials.