Programs that, when installed on your computer, change settings, display advertising, and/or track Internet behavior and report information back to a central database. That”s usually an Internet marketing website. Spyware sometimes installed unintentionally by users along with other wanted software, and can be very hard to remove. Also known as malware.

SUPERAntiSpyware is the most thorough scanner on the market. Our Multi-Dimensional Scanning and Process Interrogation Technology will detect spyware that other products miss! SUPERAntiSpyware will remove ALL the Spyware, NOT just the easy ones!

a-squared HiJackFree is a detailed system analysis tool which helps advanced users to detect and remove all types of HiJackers, Spyware, Adware, Trojans and Worms.

Ad-Aware 2007 Free continues the Lavasoft tradition and spirit by providing a no-strings-attached, full powered free anti-spyware product that is safe, thorough, and easy to use.

SpyBot-S&D searches your hard drive for so-called spy- or adbots; little modules that are responsible for the ads many programs display. But many of these modules also transmit information about your surfing behaviour and more to the net.

NOTE:  If your EXE file associations are corrupted, it can be difficult to open REGEDIT, or to even import REG files.  To work around this, press CTRL-ALT-DEL and open Task Manager.  Once there, click File, then hold down the CTRL key and click New Task (Run).  This will open a Command Prompt window.  Enter REGEDIT.EXE and press Enter.
Thanks to Nigel Andrews for this tip.

Batch File Association Fix (Restore the default associations for BAT files)
CAB File Association Fix (Restore the default associations for CAB files)
CHM File Association Fix (Restore the default associations for CHM files)
COM File Association Fix (Restore the default associations for COM files) – Thanks to John Hanney
CPL File Association Fix (Restore the default associations for CPL files)
Directory Extension Fix (Restores defaults to HKCR\Directory)
Drive Association Fix (Restores default settings for hard drives)
EML File Association Fix (Restores defaults for EML files)
EXE File Association Fix (Restore default association for EXE files)
Folder Association Fix (Restore default associations for File Folders)
GIF File Association Fix (Restore default associations for GIF Files)
HLP File Association Fix (Restore default associations for HLP files)
HTA File Association Fix (Restore default associations for HTA Files
HTM/HTML Associations (Restore the default associations for htm/html files)
ICO File Association Fix (Restore the default association for ico files)
INF File Association Fix (Restore the default assocation for INF files)
Internet Explorer Desktop Icon Fix (Restore the default behavior for the Desktop IE icon)
JPE/JPG/JPEG Association Fix (Restore the default associations for jpe/jpg/jpeg files)
LNK (Shortcut) File Association Fix (Restores Default Shortcut Behavior)
MPG/MPEG File Association Fix (Restores default associations for MPG/MPEG files)
MSC File Association Fix (Restore default associations for MSC files)
MSI File Association Fix (Restore default associations for MSI files)
MSP File Association Fix (Restore default associations for MSP files)
REG File Association Fix (Restore default associations for REG files)
SCF File Association Fix (Restore default associations for SCF files)
SCR File Association Fix (Restore default associations for SCR files)
TXT File Association Fix (Restore default associations for TXT files)
TIF/TIFF File Association Fix (Restores default associations for TIF/TIFF files)
URL File Association Fix (Restores default associations for URL – Internet shortcuts)
VBS File Association Fix (Restores default associations for VBS files)
ZIP Folder Association Fix (Restores default associations for ZIP Folders – REG File)