Sygate, http://scan.sygate.com/
hackerwhacker , http://delta.hackerwhacker.com/freetools.php
HackerWatch, http://probe.hackerwatch.org/probe/probe.asp
GRC, https://www.grc.com/x/ne.dll?bh0bkyd2
Blackcode, http://www.blackcode.com/scan/
DSLReports, http://www.dslreports.com/scan
SecurityMetrics, http://www.securitymetrics.com/portscan.adp
Lockdowncorp.com, http://stealthtests.lockdowncorp.com/
Securityspace, http://www.securityspace.com/smysecure/norisk_index.html
Symantec, http://security.symantec.com/sscv6/home.asp?bhjs=0

Auditmypc, http://www.auditmypc.com/
Qualys, http://browsercheck.qualys.com/
Scanit.be, http://webtest.scanit.be/bcheck/index.php
Iprive, http://www.iprive.com/analyze/

GFI Trojanscan:
http://www.trojanscan.com/trojanscan/
Sygate Trojanscan
http://scan.sygate.com/pretrojanscan.html
Blackcode Trojan Scan
http://www.blackcode.com/scan/index.php

Popup tests sites:
http://www.kephyr.com/popupkillertest/index.html
http://proxomitron.info/tests/poptest.html
http://www.dummysoftware.com/popupdummy_testpage.html
http://www.webknacks.com/aptest.htm

Personal Information
http://privacy.net/analyze/
http://www.gemal.dk/browserspy/
http://www.elfqrin.com/binfo.shtml

list of free online services:
-virus scans-portscans-security scans-more
- http://www.wilders.org/free_services.htm

Computer Cops Online Security Nmap Port Scanner - members only -
- http://www.computercops.biz/modules.php?name=nmap

- Gibson Research Center -


You can try to find out how secure your PC is, by going to :

- http://grc.com/intro.htm

and run "ShieldsUp!" to test from the outside, and "LeakTest" to test from the inside.

Then , if you didnt have a firewall before , install Outpost / Sygate / Zonealarm personal firewall and try the tests again.

Firewalls by GRC:
- http://grc.com/su-firewalls.htm

Evil Port Monitors?:
- http://grc.com/su-evilportmon.htm

GRCSucks   
- http://www.grcsucks.com

PC FLANK (online personal firewall testing and anti-trojan testers)...

- http://www.pcflank.com/about.htm
"We recommend 3 main routes of passing PC Flank's tests".
These are "Rookie", "Advanced" and "Rush"