Online free antivirus scan
http://housecall.antivirus.com/
http://virusall.com/downscan.html
http://www3.ca.com/threatinfo/virusinfo/scan.aspx
http://security2.norton.com/ssc/vc_about.asp?langid=nl&venid=sym&plfid=20&pkj=DEDJGFRHUUEOLULNPWV
http://www.mcafee.com/myapps/mfs/default.asp
http://www.bitdefender.com/scan/licence.php
http://www.pandasoftware.com/activescan/com/activescan_principal.htm
http://www.ravantivirus.com/scan/
http://housecall.trendmicro.com/housecall/start_corp.asp
http://www.commandondemand.com/ online virus scan
http://www.freedom.net/viruscenter/onlineviruscheck.html free online virusscan based on f-prot

Where can I scan my machine online for spyware
http://www.aluriasoftware.com/spywarelab/ and free scan online
http://www.pestscan.com/ free anti spyware scan of your pc
http://www.spykiller.com/index.asp?ref=2301&p=1
http://www.spywareremove.com/
http://www.spywareinfo.com/xscan.php
Online anti trojan scans http://www.trojanscan.com/
more online scans ·GFI ·Sygate ·webzila
http://www.cipher.org.uk/index.php?p=projects/Scanner/scanner.cipher scanning online for 118 most know trojans