How do I know if I have fake virus?
Scareware is typically used to download malicious software onto a computer. Telltale signs that a virus is present on a device include receiving lots of unwanted pop-up ads or error messages, unexpected freezes, crashes, or restarts, icons unexpectedly appearing on the desktop, sudden device or file lockouts, a computer suddenly running slowly, and web browsers being set to a new homepage or having new toolbars.