Website billing me and blocking my computer when i didn't even sign up!

[Bugfresh]

My friends thought it would be funny to post a rude picture as my screensaver when i was in the shower so they accessed a website and put my details into it. Now its 3 weeks on and every time i turn on my internet this 'bill' pops up saying i have to pay for my so called 'subscription' and it locks my computer, as the weeks have gone by it has locked for longer and longer each time. It is something to do with MBS Account Manager if anyone knows how this software got onto my computer and how to get rid of it....Please please help its driving me mad!

[daffy654]

http://www.virusvault.co.uk/fusionbb/showtopic .php?tid/519/pid/2431/post/last/m/1/

[vehelpfulguy]

And to stop this in future set a password on your userid.

The instructions below work on XP.

You can set a password by going into the Windows control panel and selecting User Accounts.

Set yourself a password AND DONT TELL ANYONE WHAT IT IS.

Every time you leave your PC press the Ctrl key AND the Alt key AND the Del key at the same time.

A small Windows Security window comes up.

Select Lock Computer and your computer will be unusable.

You will need to put your password in to use it again.

DONT FORGET YOUR PASSWORD.