1. Many softwares need a system to support their running, so they will leave the running programs in the system disk.

2. Because the system has not been reinstalled for a long time, there will definitely be more and more buffer files.

3. It is recommended to update the system once a year and a half. It is best to install the pure version of the system.

4. Slimming, moving and other software can't completely solve all the problems, but it still depends on the usual maintenance.

5. In addition, file users seem to be automatically generated.

6. This will happen if you use a lot of software. If you don't use it a lot, this problem will only show that you are not good at keeping and maintaining it.

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Baidu team Lei Hu Empire answers for you.