How to delete windows.old files after reloading the Win7 system:
1, into the resource manager, in the C disk (with a reload system after the production of the Windows.old folder system disk) Right click on the property;
2, open the C-Disk Properties dialog box, such as the figure, click Disk Cleanup;
3, waiting to analyze the new installation system of garbage files, folders;
4, did not find a large file, generally in more than 10G, this time you can click to clean up the system files;
5, continue scanning analysis, will search to the previous Windows installation, check, and then click OK;
6, will pop up a confirmation window, click Delete file;
7, the C disk will be cleaned at this time, including the Windows.old folder after the reload system;
8, clean up the old system, after cleaning up to see the system disk file, this reload system after the production of the Windows.old folder will not exist again.
Supplementary note: After reloading the system, the resulting Windows.old folder has no effect on the new system and will occupy space, so it can be deleted.