When the system exhibits the following phenomena, it may be infected with a virus:
1. The screen suddenly displays some abnormal strings or specific images.
2. The screen continuously scrolls or shows disordered data arrangements and other abnormal conditions.
3. The system's operating speed significantly decreases, sometimes appearing as if it has frozen.
4. File lengths increase inexplicably, or files suddenly disappear, requiring hard drive data recovery.
5. Programs that previously ran normally suddenly fail to execute.
6. The system frequently experiences unexplained crashes.
7. The system often performs read/write operations on the disk without cause.
8. The system suddenly cannot access drive C.
9. The available storage space on the disk suddenly decreases for no apparent reason.
10. New files suddenly appear on the disk, including hidden files and files with names similar to existing file names and system file names.
11. The file allocation table on the disk suddenly becomes corrupted.
There are many more signs that a computer may exhibit after being infected with a virus. From a computer maintenance perspective, when a computer malfunctions, one should first suspect a virus. However, it is important to note that viruses are just one of the factors that can cause a computer to malfunction, not the only factor.
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