My face book acc has blocked

Hello,

My face book account has been blocked from last 6 days. And its showing the error
Your Computer Needs to Be Cleaned
It looks like your computer is being affected by malware. We’ll help you fix the problem to keep your account secure and prevent malware from spreading to friends.
Malware is software that tries to steal personal information and causes problems when you use Facebook. Clicking or sharing links that contain spam can give your computer malware. How can i rectify this problem?