Symptoms of a computer virus

1. Sometimes computer may not boot and hang quickly.
2. Viruses show error message on the screen.
3. Unwanted message,figure and picture can be seen on the screen.
4. It takes a long time to load the program.
5. It changes the size of executable file.
6. It slows down the computer.
7. It reduces the memory of a computer.
8. It corrupts the system data.
9. It renames all the files with different names.
10. It increases the use of disk space and growth in file size.