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Scan the computer with all kinds of antivirus software without virus, but the system runs slowly. There was a virus in the previous scan, but it was deleted later, and it was still very slow.
There are many reasons for the slow system, which are generally caused by viruses, too many startup items and program conflicts. , does not rule out system and hardware problems. It can be solved by the following methods first.

1. Install anti-virus software and monitor the overall anti-virus.

2. There are too many startup items, and general programs except antivirus software and input method can be prohibited from starting.

3. Check the software with high cpu utilization rate in the process. You can replace this software with other similar software with low cpu utilization.

4. There are too many beta drivers installed on the computer, especially graphics drivers. It is best to choose a driver certified by Microsoft or officially released.