Killer Performance Suite Issue

Hi guys, I have some issues regarding the latest Killer Performance Suite.

Yesterday i wanted to install the latest driver from Killer Networking - Driver Downloads.
The version was 1.1.56.1572.

I first tried to uninstall the current driver i am using, but what was strange was that there were two killer performance suite in my add/remove program, the current version i am using and the one previous to that. Anyway i tried deleting both but during the uninstallation, an error poped and said i couldnt delete the killer n-driver. So i was told to delete the registry via regedit via regedit (wasn't sure it was smart but it was late and i just wanted to sleep as i had work in the morning).

Anyway, that seemed to have done the trick. After restarting my laptop, i then tried installing the latest driver but then i receive this error:
"The installation of killer wireless-n driver 64 bit appears to have failed. Would you like to continue"

I did continue and aftert a restart my wifi just didnt work, after checking the network adapter via device manager and it told me that it has an error code 52: Windows cannot verify the digital signature for the driver. The driver version was also very old and dates back all the way to 2006. This is weird because it never happened before. And now ive been going back and forth trying to install and uninstall but keep getting the same errors.

I am stuck right and would appreciate any help i can get, thank you for your kind assistance,