Your computer is in danger! spyware/adware infection..HELP!!!?

it all happened when i tried to download a crack file..it infected my comp! i have 3 problems i need to solve.

1.my desktop background is now all black(altho desktop items are present) with a message at the bottom saying 'Your computer is in danger! Windows have detected spyware/adware infection etc'.

2.also i keep getting a message in the form of a balloon all the time saying 'your computer is infected! windows has detected spyware infection. you need specific spyware tools etc'

3.the other problem is, when i click ctrl+alt+del an error message says 'Task Manager has been disable by your administrator'..now im sure my administrator hasnt disabled anything, i think its the spyware/adware/virus thats doing this.

Finally, i have AVG Anti-spyware 7.5 and Avast antivirus installed. they detected several viruses and malware which i deleted, but still the above 3 problems are present. please HELP!!

Your computer is in danger! spyware/adware infection..HELP!!!?network security

Do as the first answer says, re-run your spyawre and virus scans with your computer in safe mode. If that does not clear out the infection then you need a more powerful anti-spyware program. The exact same thing happened to me last year except my screen went blue. I solved it with some expert help by installing CounterSpy anti-spyware. Have a look below, it tells the story.