Ukash Virus is an aggressive ransomware scam that tries to steal money from you. The infection displays bogus messages of various official institutions, mostly local police. Ukash Virus locks your PC completely, therefore you will be not able to perform any task on your computer. To unlock PC, the message advises to pay the fine. However it is only a scam and paying the fine will not unlock your PC.
Ukash Virus ransomware is named Ukash Virus under the payment platform which the virus requires. The fines are paid by using a pre-paid system. Remember, that none of official institutions would request to make payments via systems like Ukash. Therefore it is a strong evidence that this is not a real warning and none other than a scam.