Okay Kim - there is an easy way to fix this hun....
Run that HIJACKTHIS programme again till you get the results - don't close it when it has done!!!!
Scroll down the report till you see this entry;
O4 - HKLM\..\RunServices: [msconfig38] mssvcc.exe
highlight this (make sure no other items have a tick next to them) and put a tick in it's box. On the interface of your HIJACK THIS programme you have a button that says FIX CHECKED. Press this. This should remove the item from your PC and sort it out for you.
I would also advise you do the same with the line;
O23 - Service: Win32 Kernel Update (Win32Kernel) - Unknown owner - C:\WINDOWS\win32host.exe (file missing)
aswell, as already pointed out - it's a left over trojan file....