How to delete the Windows.old folder to release the C disk space after reloading the win7 system

How to delete the Windows.old file after reinstalling the win7 system:
1. Enter the resource manager, in the C drive (with reload System disk of the Windows.old folder generated after the system) Right click on the property;
2. Open the properties dialog of the C drive, as shown in the figure, click on Disk Cleanup;
3. Wait for analysis of the garbage in the newly installed system. Files, folders;
4, did not find large files, generally above 10G, this time you can click to clean up the system files;
5, continue scanning analysis, will search for the previous Windows installation, check, Then click OK;
6, will pop up a confirmation window, click to delete the file;
7, this will clean the C drive, including the Windows.old folder generated after reinstalling the system;
8 Clean up the old system. After cleaning, go to the system disk file. The Windows.old folder generated after reinstalling the system will no longer be used. In the.
Supplementary note: The Windows.old folder generated after reinstalling the system has no effect and effect on the new system, and it also takes up space, so it can be deleted.