2. There are too many random startup items on the computer, so you can run msconfig to cancel unnecessary random startup.

3. Don't install the downloaded program on drive C, which will lead to slow response. If it has been installed on disk C, you can use the move function of disk C of 360 Security Guard to move to another disk!

4. It may be poisoned. Check with 360 antivirus. 5. It is possible that malicious plug-ins or rogue software were killed and repaired by 360 security guards.