Here is an update!
OK Sephiroth, i ran a search for taskmgr.exe, and there are 5 files! One is in the windows folder, another in windows/system32 and another in windows/system32/dllcache. I went into the properties and they are all microsoft applications. There are another two but arent .exe, they are called TASKMGR.EXE-25DA9018.pf and TASKMGR.EXE-06144C13.pf and they are in windows/prefetch. I have no idea what they do. I went into the windows task manager and there are 2 taskmgr.exe files running at the same time.
Here is the more complicated part, ran a search for update.exe and got quite a few results, there are three update.exe in the same folders as the taskmgr.exe. The thing that stands out is that there is an update.exe in the windows/system folder, and in the properties window, it doesnt say that it belongs to microsoft, it just says application??
User needs - i uninstalled MEMturbo and that didnt do anything. thanks for ur advice anyway.
ZONE-MR - I did what u said and i ended the 2 taskmgr.exe and the update.exe and that made a big difference! everything went back to normal. I have no idea what these files do, but they sucked all my CPU!! I went into msconfig, and there is nothing suspicious expect that the 2 taskmgr.exe and the update.exe are there, i have unticked them, but cant reboot yet, cos im rendering something, on the next reboot i will let u know the result!!!
A big THANK YOU to everyone that replyed to my post, much appreciated!