Here are some examples of some symptoms that may be caused by a computer virus:
- A computer program disappears from its memory, especially if there is no known removal of the program.
- Unfamiliar music or sounds unexpectedly starts playing through the speakers.
- Icons appear on the desktop unrelated to any programs that are currently being installed, or new icons seem to appear when no software has been installed.
- An antivirus program will not run, or a new one will not install properly or at all.
- Previously installed antivirus programs will suddenly disable and cannot be restarted.
- Files that have been recently opened suddenly have more than one extension, such as .exe, .vbs, .gif, or .jpg.
- Dialog boxes and menus seem to be distorted or different.
- Unusual error messages will pop up.
- Items are not printing correctly.
- Disk drives or disks become inaccessible.
- An application or applications are not working correctly.
- The computer isn’t running as well as usual, or the computer reboots on its own.
- The computer restarts continuously.
- The computer locks up frequently or stops responding.
- The computer seems to be losing processing speed.
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