Your Computer has been blocked - US Department of Justice

Have you tried following these steps:
http://malwaretips.com/blogs/department-of-justice-virus/


Hope this helps!

:o)

Bartender_1

If you can't get to safe mode, you could try this software to boot from and edit the affected registry settings:

http://www.raymond.cc/blog/how-to-edit-windows-registry-key-values-without-booting-in-windows/

Hope this helps!

:o)

Bartender_1

You can try booting to a rescue CD like Kaspersky's, or another if you have a preference.
http://support.kaspersky.com/4162

another article:

http://forums.anvisoft.com/viewtopic-45-2726-0.html

I like the Kapersky Rescue Disk myself.

I use a SARDU created disk which everything on it.  It is worth making one of these for just such occassions:

http://www.experts-exchange.com/Storage/Misc/A_3038-Boot-Disks-UBCD-UBCD4Win-and-SARDU.html

It's called "ransomware" malware... whatever steps you take, do NOT give them any money, because that will NOT fix the problem.

I have seen it fixed with sophos antivirus boot disk and/or combofix from bleepingcomputer.com.

i had success with the offline Defender CD : http://windows.microsoft.com/en-US/windows/what-is-windows-defender-offline

I tried EVERYONE's solutions, but ended up having to reformat.