What are the functions of inventory cleaning software

We can not easily hand over the computer to the cleaning software, so it is best to figure out the principle of how they run, how to judge the usefulness of the file is useless, how to judge the registry key is invalid, below Xiaobian will take you to see how the garbage cleaning software cleans up your computer. The process of software cleaning garbage is taken as an example of 360 security guards. After starting the program, switch to “One-click cleanup”, select the items to be scanned, and click ““ One-click cleanup” to start scanning the files in the specified location. After the completion, the scanned items will be deleted according to the default items. Junk files (Figure 1). Figure 1 360 security guards one-click cleaning interface As can be seen from the above description, the general process of junk file cleaning is: set the scanning conditions & rarr; scan specific files & rarr; according to the check to delete the specified file. The most important of these is "set scan conditions", that is, how to judge junk files, please see the analysis below. The judgment criteria of junk files are classified according to the nature of the files. There are three main types of junk files: the first is files that are useless in the computer, such as recycle bin files, video buffer files that have been viewed, and temporary files generated by the Internet. The second category is the use of trace files for computer software, such as Word to open records, Internet browsing records, and so on. The third category is redundant items in the registry, such as invalid, incorrect registry items. The garbage cleaning software also mostly sets the scanning conditions by referring to the above three types of files. For example, in Jinshan Guardian & quoquo; Garbage Cleanup, after the scan is completed, the program will list the scanned junk files (Figure 2). Figure 2: The junk files scanned by Jinshan Guardian 1. The junk files of the computer useless files, such as system garbage, Internet residual garbage, video music garbage, etc., generally have specific file extensions, which are generated by the system. For example, click on the "junk details" in the window that opens. You can see that the junk files here are mostly "*.log" or "“*.tlg" files. Only the specific location of the file is different (Figure 3). Figure 3 Garbage log file type So Jinshan Guardian determines whether the file is junk based on the file suffix. For example, to determine and scan the Tencent product log junk file, because Tencent software is generally in “C:\\Users\\current user\\AppData\\ Roaming\\Tencent\\Logs” generates log files, so the garbage cleanup software developer only needs to add a line to the code to search for the above directory “*.tlg”, and then add a “Del *.tlg” delete command, You can complete the cleanup of Tencent product log junk files. In addition to relying on file extensions, you can also rely on the specified directory to determine, such as Windows 7 temporary file directory in %USERPROFILE%\\AppData\\Local\\Temp, cleaning software as long as you set a command to delete all files in the specified directory It is.