Can I delete windows.old file after installing windows 7?

I have just installed windows 7 and now have two files windows.old and windows.old.000 and they are taking up about 40gb on my hard drive and i would like to get rid of them if possible. Can I do this?
 

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Last updated December 3, 2019 Views 210,114 Applies to:
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Hi andrewatkins777,

 

If you install Windows 7 by performing a custom installation and don't format the partition during the installation process, files that were used in your previous version of Windows are stored in the Windows.old folder.

User folder under windows.old will contain pictures, files and documents of all the users.

Please take a back up of all data and folders onto a external hard drive before deleting this folder.

  

1.    Open Disk Cleanup by clicking the Start button. In the search box, type Disk Cleanup, and then, in the list of results, click Disk Cleanup.

If you're prompted to choose a drive, click the drive you just installed Windows on, and then click OK.

2.    In the Disk Cleanup dialog box, on the Disk Cleanup tab, click Clean up system files.

If you're again prompted to choose a drive, click the drive you just installed Windows on, and then click OK.

3.    Select the Previous Windows installation(s) check box, and any other check boxes for the files you want to delete, and then click OK.

4.    In the message that appears, click Delete Files.

 

To know more about this visit the following link:

http://windows.microsoft.com/en-US/windows7/How-do-I-remove-the-Windows-old-folder

 

Let me know if this helped.

Regards,

Divya R – Microsoft Support.

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