MalwareBytes and SUPERAntiSpyware are two effective utilities I often use to get rid of stubborn malwares from infected computers and they have never let me down when in need, the good news is now you can use SUPERAntiSpyware without installing it for a quick scan on target computer.
The company calls it SUPERAntiSpyware Online Safe Scan but actually it's more like a full-blown 9.35 MB portable download which requires no installation and leaves no traces behind, the good thing is it can be updated so you can have it with you on your portable drive for immediate rescue.
If you have already jumped onto the Windows 7 bandwagon or plan to do so, you might find yourself having a tough time figuring out a compatible security software for the new operating-system still in beta, luckily many antivirus products from reputed security software companies do work with Windows 7 Beta out-of-the-box, here is a list of known working anti-virus solution for Windows 7.
While quite a few anti-viral software work on Windows 7, Kaspersky Anti-Virus for Windows 7 technical preview is the only anti-virus software which is made exclusively for Windows 7 operating system, The prototype includes an antivirus, firewall and anti-spam solution for the upcoming operating-system, users are allowed to try this new version for free on their Windows 7 computers till 23-04-2009.
Here is a list of anti-virus applications known to work well on Windows 7:
There exist hundreds of fake anti-spyware and anti-virus software's with the sole aim of forcing computer users into paying for removal of nonexistent malware, these genre of fake products is known as Rogue Anti-Spyware Products, these malicious applications gets installed on computers by deceiving users using false advertising or by taking advantage of security vulnerabilities, once installed these applications display false malware detections, nagging user with false security alerts and even disable access to certain functions urging users to buy the product and remove detected malware's and restrictions.
One of the most common rogue antispyware application is MS AntiSpyware 2009 and MS AntiVirus 2009, once installed this rogue antispyware nags user with fake alerts and buy now dialog boxes.