Two days ago as i was downloading a subtitle for a movie, my desktop suddenly changed and an advert saying that my computer have been infected popped up and became my new desktop background. tried to change the background yet there was no place to click. my web searching gave me many options and finally i managed to get successfully solve the problems. then came a new problem! i cannot access www.symantec.com, windows update, many antivirus plus online virus scanners. even some websites where i could get help could not be accessed. i downloaded spydoctor yet couldn't update it. i worked around it by using google's pack. i have used fixwaresout.exe , hijackthis, regcure (it keeps opening every time i start my computer), cleaned the HOST file and there was nothing in the log except this "127.0.0.1 localhost". even the hijackthis log could not open in notepad(seems to be malfunctioning too) but only with wordpad. initially norton 360 was launching at startup yet it isn't lauching in anyway. i have followed a number if not tens of solutions yet i still cannot access antivirus/spyware/malware etc... related sites or even forums. it was by sheer lucky that this websites opened. shuffled the DNS yet the problem persists. checked with the rootkit revealer, failed to reach a solution. i tried lauching anchorfree hotshield same story: couldn't. before this i could. i really do not want to re-install xp because there are too many valuable things in my computer. system restore doesn't work. it says on but when i want to back up my data, there is a prompt which requires me to turn on the system restore, yet the computer shows its on. i am very confused as of now. please help!.