Trend Micro™ HijackThis™is a free utility that generates an in depth report of registry and file settings from your computer. HijackThis makes no seperation between safe and unsafe settings in its scan results giving you the ability to selectively remove items from your scan results identified as malicious or unwanted from your machine. In addition to this scan and remove capability HijackThis comes with several tools useful in manually removing malware from a computer.
How to Use:
Once you have installed HijackThis and generated a log file you can compare your logfile against other by clicking the AnalyzeThis button. If you do not understand your scan results try sharing your log file with a knowledgable person that can help you identify which results you should remove. For more in depth information on how use this versatile utility just click the "Open online HijackThis QuickStart" button when you open HijackThis.
How to Use:
Once you have installed HijackThis and generated a log file you can compare your logfile against other by clicking the AnalyzeThis button. If you do not understand your scan results try sharing your log file with a knowledgable person that can help you identify which results you should remove. For more in depth information on how use this versatile utility just click the "Open online HijackThis QuickStart" button when you open HijackThis.
System requirements:
* Microsoft™ Windows™ Vista
* Microsoft™ Windows™ XP
* Microsoft™ Windows™ 2000
* Microsoft™ Windows™ Me
* Microsoft™ Windows™ 98
Software:
* Microsoft Internet Explorer 6.0 or 7.0
* Mozilla™ Firefox™ 1.5 or 2.0
IMPORTANT: HijackThis does not determine what isgood or bad. Do not make any changes to your computer settings unlessyou are an expert computer user.

Haven't used it in ages but it used to be a good piece of software when I did....is it still any good?
better than the old version!
I'll be updating for sure
I'll be updating for sure
[v2.00.0]
* AnalyzeThis added for log file statistics
* Recognizes Windows Vista and IE7
* Fixed a few bugs in the O23 method
* Fixed a bug in the O22 method (SharedTaskScheduler)
* Did a few tweaks on the log format
* Fixed and improved ADS Spy
* Improved Itty Bitty Procman (processes are frozen before they are killed)
* Added listing of O4 autoruns from other users
* Added listing of the Policies Run items in O4 method, used by SmitFraud trojan
* Added /silentautolog parameter for system admins
* Added /deleteonreboot [file] parameter for system admins
* Added O24 - ActiveX Desktop Components enumeration
* Added Enhanced Security Confirguration (ESC) Zones to O15 Trusted Sites check
the previous "2.0" version was a beta. this makes it an official release
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