My usual answer for spyware is to get yourself a good Anti-spyware checker. Although today someone asked me about this particular one (SpyShredder) and asked if I could remove it. I stuck AVG anti spyware on the system did and did a scan. AVG did find SpyShredder, and removed it. Although after a restart it came back

So here is a quick guide to manually removing it.

1. Open Task Manager (Hold Ctrl+Alt and press Del)

2. Go to the processes tab, and end the following three processes (although they may not all be running).
SpyShredder.exe
avp.exe
mgrs.exe

3. Unregister the following files one by one. (By clicking start -> Run -> and typing regsvr32 /u ***)
where i have typed ***, replace with the following file names (do 1 at a time)
SpyShredder.exe
avp.exe
mgrs.exe

4. Go to My computer and browse to C:\Program Files. Look for a folder named SpyShredder. Delete this folder (when you delete the folder hold the Shift key on your keyboard to perminantly delete it)

5. Restart the PC.