Computer Virus Symptoms
Listed below are some of the most common computer virus symptoms.
Is your computer infected with a virus?
- Windows will not start up, and the computer continually reboots.
- Unexplained message boxes frequently pop up.
- Windows will not start and displays a blue critical error screen.
- New programs may appear on the computer which were not intentionally installed.
- Your antivirus program is disabled and will not restart.
- New antivirus software cannot be installed on the computer or will not function correctly.
- Memory low error messages appear.
- Windows Task Manager will not open or disappears.
- The computer takes longer than normal to start up.
- System performance is noticeably slower.
- You may notice increased traffic across your Internet or LAN connection when not in use.
- Windows restarts unexpectedly.
- A friend or college may inform you that they have received a strange e-mail from you, which you did not send.
- Documents, programs and other data may mysteriously disappear from the computer.
- The computer starts as normal, then completely freezes after a few minutes of operation.


