Windows. The old folder is a backup of the previous legacy system Win7. Because of its specificity, users cannot delete the folder directly. A "Cannot find this item" error often occurs when you delete directly, causing Windows 7 's Explorer (Resource Manager) to crash. So how do we get rid of the Windows.old folder?
Expand in sequence: Computer → Click the Windows.old folder's letter Right → "properties"
2. After opening the Windows.old folder, click Disk Cleanup, and the Disk Cleanup tool will begin scanning the files that characters can clean up.
3, when the scan is complete, the Disk Cleanup tool displays a list of files that can be deleted, in which you can see "Previous Windows Installations" and display the capacity size, as described in the description below, which is named Windows.old, which reminds you that the temporary files in the list, Error file reports and other files that are not selected together, and then click OK.
4, after the confirmation system will pop-up prompt window, ask whether to permanently delete the selected files, click "Delete Files", the selected files will not be deleted "Recycle Bin", but do a permanent deletion, so before you confirm the deletion, be sure to carefully check whether the files need to be deleted.
5, click "Delete Files" after the Disk Cleanup tool to start cleaning the selected files, after a few seconds to a few minutes of time (length of time by the size of the file), Windows.old folder and the user selected files will be completely deleted.