MalwareStopper is one of those Rogue Antispyware programs that does the exact opposite of what its name would seem to indicate!  Rather than protecting your computer from malware, it is actually actively involved in attacking the hard drive and even taking over control in many ways.  The purpose of these types of insidious programs is to try to intimidate computer users into purchasing unnecessary software by making them believe that their machine is in immediate peril. The fact is that in many cases, however, the worst malware present on a hard drive at the time is MalwareStopper itself!
MalwareStopper will increase the number of unsolicited ads popping up on a computer, as well as slowing processing speeds with its hijacking of the browser and settings.
Manual Removal Instructions:
Some particularly computer-savvy users may want to try to manually remove MalwareStopper from the computer on their own, but while this is possible, it is also important to recognize that this can be a very difficult task.  This is because the MalwareStopper actually tends to reinstall its own missing files as they are deleted, sometimes making this manual removal attempt an exercise in futility!  For the intrepid who still wish to attempt it, however, these are the steps for manual removal…

Type: Rogue Security Application
Be sure to remove this file:
MalwareStopper MalwareStopper.lnk
Delete the following process thoroughly:
MalwareStopper.exe
Followed by deleting these registry values:
malwarestopper.exe
malwarestopper0.dll
malwarestopper1.dll
malwarestopper2.dll
malwarestopper3.dll
malwarestoppersetup.exe
For those who do not wish to attempt to delete MalwareStopper on their own, or for those who have tried to do so unsuccessfully, there are other very reliable options available.  True antispyware programs, developed to sniff out, identify, and completely remove these types of malware, are a safe and effective option for those who have had their computers victimized by unwanted files of this sort.
One of the best of these commercially available programs is called ZookaWare PC Cleaner. A product from the experts at the BluePenguin software company, it has a sterling history of protecting computer users from all sorts of malware attacks.  Because ZookaWare PC Cleaner is constantly updated, it is also able to serve as a help against the constantly emerging malware programs that come out almost daily, as well.  Best of all, ZookaWare PC Cleaner comes with a full guarantee on its services!