http://www.poegasm.com/computer-software-programs-free-download/

What free software can I download that will remove spyware,adware,trojans,viruses for free without a CD key?
This is my last resort before possibly having to visit the computer repair person tomorrow. I have downloaded some programs but they will not let me delete it unless I have a registered CD key.
Any useful shareware/freeware you know of that is helpful to remove those listed above?
PC Tools Threat Fire is PC Magazine Editor’s choice anti-virus that is most effective.
ThreatFire’s patent-pending ActiveDefense
technology offers protection against all types of internet threats
- both known and unknown – spyware, adware, keyloggers, viruses, worms,
Trojans, rootkits, buffer overflows, and other malware.
http://www.threatfire.com/
PC Tools Firewall Plus is a powerful free personal firewall for Windows
that protects your computer by preventing unauthorized users from gaining
access to your computer through the Internet or a network.
By monitoring applications that connect to the network
Firewall Plus can stop Trojans, backdoors, keyloggers
and other malware from damaging your computer and stealing your private information.
http://www.pctools.com/firewall/
Both use little system memory while giving you the same protection.
Your system will be faster as a result.