Here are two screenshots of fake warnings. If you see a popup like one shown here, your computer may already be infected. Shut it down and take it to the Computer Helpdesk or your IT support staff to resolve the issue.
What Happens If My Computer Gets Infected?
The viruses that get installed can:
Trick you into entering your credit card information or passwords or personal information.
Steal your bank account information and empty out your account.
Send spam messages from your email address.
Corrupt or destroy your documents.
Allow other, stronger infections into your computer.
Crash your computer or slow it to a crawl.
Infect other computers both on the Internet and on a local network.