Spyware/rootkit problem

[metamorphpwner]

a lot of sites I go on I keep getting a file trying to download itself:
bk-coretag.js from tags.bkrtx.com
dpx.js from i.simpli.fi

Both of the above, it's not just one certain site it seems to be nearly any site I go on.
I've looked online and found how to remove them using malwarebytes and it says they're gone but they keep coming back and my avast keeps going crazy.

there's also a file in my C drive which wont delete and the bits I delete keep coming back - program file\MSR\privoxy. which is causing avast to go crazy and can't get rid.

anyone got any help for these problems? getting really annoying now.

 

[~Divine~Wind~]

Well if Avast aint sorting it out I'd try summit else mate.
Give hitmanpro a bash seems far better than MWB from what I've seen

 

[AStaley]

Try downloading the Kaspersky rescue disc, burn it to a CD or copy to a bootable USB. Then let it update and run a full scan, then reboot and clean temp internet files and the temp folder under Windows and User.