c:/users/username/appdata There are three folders, respectively, local,locallow,roaming, simply, are used to store the software configuration files and temporary files, there are many software companies or software names named folders, Theoretically all can be safely removed. For example, if you install Photoshop CS4, search for Adobe in AppData, delete all files and folders that you've found, and then start Photoshop, the deleted files will regenerate, but smaller. Be careful when deleting files, because AppData also holds the profile of the user account. With the increase of the system usage time and installation software, the space occupied by the AppData will be more and more big. There is a very simple way to safely delete AppData entire folder, that is, to delete an account. One advantage of replacing a user account is that it can "reset" the system, reduce the amount of junk files, but it can also cause a lot of trouble, as if the system is back to a new installation, some software needs to be reactivated, and very few individual software needs to be reinstalled.
Attached: three of these folders function, inside the file can be arbitrarily deleted.
c:/users/username/appdata/local/temp inside is a temporary file.
c:/users/username/appdata/local/microsoft/windows/temporary Internet Files inside is the IE cache file (default is hidden).
c:/users/username/appdata/local/microsoft/windows/history inside is the browser history (default is hidden).
May 4, 2010 Update:
c:/users/username/appdata/local/iconcache.db is the famous icon cache file, delete iconcache.db can sometimes solve many problems.
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