Trojan.Bootlock
Trojan.Bootlock is a trojan infection which rapidly infects master boot record (MBR). Trojan.Bootlock infiltrates a target computer and then start its dirty work. At first it moves the original, first sector master boot record (MBR) to the fifth sector then patches another code before overwriting the first three sectors with a custom MBR embedded in the threat. As a result, when you start your PC it will trigger a false warning claiming your PC is blocked and that another password is needed to get it back to normal. Do not fall for this blatant attempt at gettimg your to spend money on a useless product. Remove Trojan.Bootlock immediately once it has been detected.