Try to remove the infection by rogue program/scareware:
Download these files:
If you can't download the above files using the infected PC, use another clean computer to download and save in USB/flash drive.
To use rkill or exehelper: Boot the PC in normal mode, run any format of rkill or exehelper.
It will display a blank screen which is the command window.
When if finished, do not reboot the computer but scan using antivirus program or open your browser to download any tools below:
SUPERAntiSpyware Portable Scanner
If it will not help, boot to safe mode with networking then run a scan using the scanners after updating the program.
BTW, may I ask the name of the rogue/scareware that you have in your computer? I asks because some rogue programs require other or additional steps to be removed.
I have encountered a problem when a window popped up requiring installation of Adobe flash player v.10. Stupidly I clicked on it and now have antivirus software blocking nearly all access to my computer. The only thing that I'm able to do is buy antiviral software to fix the problem. I know that if I buy it I am paying extortionists and am not at all convinced that it will fix the problem. I have tried to run system restore but that seems infected also. I have a Dell laptop running xp pro. Thanks in advance for any help.