I have this same one! It's all through my windows files! I', goin to reformatt someday! when ever I get around to it!
Here are the definitions and removal instructions for the W32.Kwbot.F.Worm http://securityresponse.symantec.com/avcenter/venc/data/w32.kwbot.f.worm.html
as far as deleting files that are write protected go, right click on them and take the check mark out of the read-only box. also, if norton picks up a virus, odds are the removal tool is at www.symantec.com
http://symantec.com This is your best friend when it come to viruses, just go there, search the virus and you can find out all about it (some have more info than others but...) as well as get a removal tool.
Sorry, guess I will have to start looking at post dates But www.symantec.com next time you get one. That is if you can even use your PC enough to get to that site when the virus is there.