SpyShredder is an extremely dangerous corrupt anti-spyware parasite that may seriously damage your system and scare you into buying the parasite itself. The main ways of SpyShredder infection are trojans and browser security exploits. Once it installs itself onto your system, SpyShredder starts harassing you with countless popups, trying to trick you into buying its full version. Moreover, SpyShredder may install other malware on your PC, thus further damaging your system...
But if there is a way to install it there is a way to get rid of it

Check this out:
http://www.2-spyware.com/remove-spyshredder.html