After I reinstalled Windows 7, Disk Cleanup stopped working.
I can start Disk Cleanup and select the drive to clean, but when I click on the OK button, the window disappears.
Here's the data from Windows Logs>Application :-
EventData 1744235005 1 APPCRASH Not available 0 cleanmgr.exe 6.1.7600.16385 4a5bc5e1 Csi.dll 14.0.4733.1000 4b5662be c0000005 00135213 F:\Users\Jacob\AppData\Local\Temp\WER419.tmp.WERInternalMetadata.xml F:\Users\Jacob\AppData\Local\Microsoft\Windows\WER\ReportArchive\AppCrash_cleanmgr.exe
The above one was with an Information icon.
The one below was with an Error icon:--
EventData cleanmgr.exe 6.1.7600.16385 4a5bc5e1 Csi.dll 14.0.4733.1000 4b5662be c0000005 00135213 bbc 01cbd5be36b572bf F:\Windows\system32\cleanmgr.exe F:\Program Files\Common Files\Microsoft Shared\OFFICE14\Csi.dll 75fa9599-41b1-11e0-b864-001966b2bcb6
I also used process explorer:
When I started disk cleanup, a cleanmgr.exe process appeared under explorer.exe.But when I clicked on the "OK" button after selecting the drive, cleanmgr.exe was there for some seconds before it disappeared. But a new process - WerFault.exe appeared under svchost.exe a few seconds after I clicked the "OK" button. It disappeared, too, from the process list after some time (I think it disappeared along with cleanmgr.exe).
Oh yeah btw. After reinstalling Windows I merged the previous Windows and users folders with the new ones because I thought my Internet connection settings were stored in the old ones. But I had done this before and there was no problem with cleanmgr. I actually reinstalled Windows 7, 3 times before. No problems at that time. This time I accidentally deleted my old useful user account files.So I recovered some of them with "Recover My Files". Then since my Internet wasnt working I merged my old Windows files with the new one and even kept the duplicates with suffix (2)