A few hours ago my laptop was infected with Ukash virus (OS: Win7). I was trying to download music from fileshare when it happened. Basically a message blocked my computer which said in Spanish that the Spanish police (I'm in Spain) has found illegal, child and animal pornography content on my computer. I have 24 hours to pay 100 euros or all of my files will be deleted. And it says I can pay with Ukash or Paysafecard. And it also gives me the options where I can buy them in Spain, plus the space for entering the PIN if I bought the card.
Fortunately I can use my computer as an administrator so I can look for help. I couldn't print screen the message, but here is a similar, with the French police that I found:
Thanks a lot for any help!!