Help clean up the junk and delete the useful files on the computer, what should I do?

Probably not, you see that at the end of these sentences, there are some suffixes, let's analyze them first:

TMP temporary files, generally are temporary files generated by systems and applications, when the system and applications exit, they will automatically delete the temporary files they created, if they are abnormal exits, the temporary files may remain on the disk, in the single-task system, they can be deleted immediately, in the multi-tasking system, those temporary files that are not in use should be deleted.

mp " is any letter, in general, the same as tmp.

gid windows 95 global index files (including help status, mostly useless).

CHK file fragments saved by Windows Disk Defragmenter or Disk Scan (file fragmentation, can it be useful?) ）

old is usually a simple backup of a deleted file.

A bak backup file, usually a secondary file created automatically or by command, contains the most recent version of a file and has the same file name as the file (which is generally useless).

That's all, everything on your computer that has these suffixes will be deleted. Most of the documents will not be used to record important documents with these suffixes.

This is indeed junk files, or temporary files!

Some software often leaves some junk files after uninstalling, such as registry residues, installation information residues, and installation folder residues. For the software that has not been uninstalled in the computer, you can manually clear the installation directory, installation information, and registry information.

For registry residues, you can easily solve it with third-party software, there are many third-party software, take Kingsoft Guardian as an example, after opening it, you can see that there is a one-click button to clean up the garbage, just accompany Xiao with a mouse click to roll to complete the cleaning of these residual registry information.

For the residual installation information and installation folder, you can find the installation directory of this software to solve the problem. Once found, delete all the files in the directory.

If you don't know where the software was originally installed, it's mostly due to pressing all the way back to selecting the default installation during installation. In this case, you can reinstall the software, you will be able to see its default installation directory when you reinstall, when you write down the installation directory and choose to cancel the installation, and then find the installation directory you just wrote down and delete the residual files in it.