Anti-virus and Anti-malware

Free Anti-virus,Download Avira

Malware removal tool:Malwarebytes Anti-Malware

Spybot search and destroy

Free anti-virus,spyware and malware download from Microsoft

http://daol.aol.com/security/internet-security-suite: McAfee free anti-virus/firewall offered by AOL

AVG Anti-Virus Free Edition

FREE antivirus software with spyware protection: avast! Home Edition

Miscelaneous

unit conversions Excel spreadsheet : a Excel file(.xls)