No hacks or dll injected hacks work

Hi a few days ago i received a virus. I then had to reset my pc to factory settings. Before the reset i had TG mw3 multiplayer. All the hacks for version 1.4.382 worked before the reset. I had now recently installed the game again with TG and tried a wallhack. Nothing happened. I kept on pressing the inject button but nothing happened. Did the same with a few other hacks but still nothing. I checked version of game and version of hacks they were all the same. No actual hack works anymore: dll, programs or such. Only thing that worked was the stat changer and that worked perfectly. Could it be because i hacked my stats? My pc is 64x- bit Windows 7. What should i do? If anymore information is needed i will gladly add more. some hacks used:Lv. und Stats Hack [1.4.382] that worked,Homohook V4 didn't work, MW3 Hook v1.0.dll didn't work.
Injectors used: Extreme Injector by master131, CP3 MW3 dll Injector. Used them both nothing happened.
Antivirus: Kaspersky. It didn't report, detect or remove any hacks, dlls, programs or injectors. Only the CP3 but its a positive false or the other way round?
Anyways version of cod is 1.4.382 and like i said before it worked before the reset but now nothing works please help!!!

Edit: Also I used the same stat changing program before reset and it worked then as well.