While using the computer for a long time, unnecessary files are stored in the computer such as installation and deletion of various applications, accumulation of data files, storage of Temporary Internet Files etc. when browsing the website on the Internet. As a result, the hard disk capacity often tends to become full by increasing it.
Disk Cleanup is useful in such cases in Windows 7 and 8, and it’s be also equipped with as a basic system tool.
This function increases the free space of the hard disk by deleting unnecessary files, such as deleting temporary files and system files on the drive and emptying the recycle bin.
How to Open Disk Cleanup
▼ First, press on the keyboard to open Run.Writing Open:1cleanmgr in the blank column of the name, and click the 2 button.
![[Windows10] Disk Cleanup](/goods/images/diskcleanup.png "How to delete unnecessary files using Disk Cleanup 1")
▼ Select 1the target drive for disk cleanup, and click 2 button.
![[Windows10] Disk Cleanup](/goods/windows10/images/diskcleanup7.png "How to delete unnecessary files using Disk Cleanup 2")
▼ Wait for a while until you prepare 「Disk Cleanup」.
![[Windows10] Disk Cleanup](/goods/images/diskcleanup1.png "How to delete unnecessary files using Disk Cleanup 3")
Deleting unnecessary data files
▼ The following dialog box opens. Check 1the unnecessary items to be deleted from the main list below, and click 2 button.
![[Windows10]Disk Cleanup](/goods/images/diskcleanup3.png "How to delete unnecessary files using Disk Cleanup 4")
▼ Click 1.
![[Windows10] Disk Cleanup](/goods/images/diskcleanup4.png "How to delete unnecessary files using Disk Cleanup 5")
▼ 「Disk Cleanup」 will be done for a while.
![[Windows10] Disk Cleanup](/goods/images/diskcleanup4-1.png "How to delete unnecessary files using Disk Cleanup 6")
Cleaning up system files
When deletion of the above unnecessary file is completed, you can delete the system file which is no longer needed this time.For example, you can delete the installation file of a previous windows version created during the upgrade to Windows 10.
As a point to notice here, this file is fairly large in file size, and it is a file necessary for executing 「recovery」when you want to return to the previous OS version from Windows 10, so be careful when deleting.
▼ Click 1 button.
![[Windows10] Disk Cleanup](/goods/images/diskcleanup5-1.png "How to delete unnecessary files using Disk Cleanup 7")
▼ Select 1the target drive for system file cleanup, and click 2 button.
▼ Preparation for deletion of the system file is done.
![[Windows10]Disk Cleanup](/goods/images/diskcleanup5.png "How to delete unnecessary files using Disk Cleanup 9")
▼ The following dialog box opens. Check 1the unnecessary items to be deleted from the main list below, and click 2 button.
![[Windows10] Disk Cleanup](/goods/images/diskcleanup6.png "How to delete unnecessary files using Disk Cleanup 10")
▼ If you Click 1 like below, and will proceed for a while.
With just deleting unnecessary files, we have secured free space.