A VPN will not affect anything really, and will only make your ping higher. Check what programs you are running, and have a look at the bottom of my signature for Xingcode help, and use the method below. It should work for you.
Xigncode3 fix for Injecting into AVA.
Then do this to check to see if it's gone, if not, delete the file.
Go to "RUN" and type in "regedit" and then OPEN: "HKEY_LOCAL_Machine > SYSTEM > ControlSet001 > SERVICES > xHunter1" then "Right Click" & DELETE "xhunter1" folder
Then download Ccleaner: http://www.piriform.com/ccleaner/download
Use Ccleaner and clean your PC, and then clean your Registry, and FINALLY reboot your PC.