If you cannot access your computer and the only thing you see on your screen is this warning message that says your computer is locked due to illegal activity, then you are infected with one of the Ukash virus variants. In case of Ukash infection, All activity of this computer has been recorded. Fake Warning appears on the left corner of your screen, right above the webcam image. The text below the small screen says:
IF YOU USE A WEBCAM, VIDEOS AND PICTURES WERE SAVED FOR IDENTIFICATION
Basically, this warning creates an impression that you are being monitored by law enforcement authorities and sooner or later you will be charged for the crimes you haven't committed. Quite a few Ukash versions do have All activity of this computer has been recorded. Fake Warning message included on their interface. For example, the Canadian Police Association Virus has this fake warning as well.
If we were to analyze the Canadian Police association virus more closely, we would see that this infection uses the official symbols of Canadian law enforcement organizations. Also, it says that the computer has been blocked due to the fact that you've been frequenting banned websites and downloading illegal software. What is more, you have to pay 100 Canadian dollars if you want to unlock your computer and avoid being charged for your so-called "crimes". However, neither the All activity of this computer has been recorded. Fake Warning message nor the accusations cited by the Canadian Police Association virus are real.
If you want to get rid of All activity of this computer has been recorded. Fake Warning and the ransomware infection itself, you have to do the following:
For Windows XP: