Capn Bloggs this article
https://support.microsoft.com/en-us/kb/2795190 suggests the DISM tool is available for W7 too.
Windows 7 Service Pack 1 or Windows Server 2008 R2 Service Pack 1 installed: DISM /online /Cleanup-Image /SpSuperseded
If that is the case but I have no means to check,
Dism.exe /online /Cleanup-Image /StartComponentCleanup /ResetBase (in administrator CMD prompt) will do a thorough job compared to simple
use of Disc Cleanup Wizard
reference:
https://technet.microsoft.com/en-us/.../dn251565.aspx