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I installed CCleaner a few days ago (forgot the exact date, uninstalled it) and when I checked control panel for the list of programs it says I installed it on April 23, 2013!

What's going on? My computer's date and time is correct, and I never changed it.

It was my first time installing this program. My OS is Windows 7 Starter.

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What version of CCleaner? – Ofiris May 19 '13 at 19:46
@Ofiris The latest version, Version 2.0 – user224248 May 19 '13 at 19:48

Well, its a bug which was supposed to be fixed in version 3.20.1750

From enter link description here

v3.20.1750 (25 Jun 2012) - Improved accuracy for uninstall items installation date and size.

Try newer version.

Moreover, programs sometimes writes installation date to:


Look for you program there, find install date, you can see you can change it and you will see difference in the control panel.

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Well it is the control panel that is showing the wrong installation date of CCleaner itself (I'm not looking at CCleaner's program list) so I think this might be a Windows problem. What do you think? – user224248 May 19 '13 at 19:56
My bet is that during installation, the program modifies its registry key which determines its installation date. – Ofiris May 19 '13 at 19:59
I checked it out and it it a registry issue, I will expand my answer. I changed Itunes InstallDate value to some other date and the value in the control panel has changed. Also see:… – Ofiris May 19 '13 at 20:06
Note that at least for me on Windows 7, as of CCleaner 4.05.4250 64bit, this problem has not been fixed. I thought I was going crazy, but it was in the registry just as Ofiris said, and responds to changes in the Registry. Weird. – kmort Sep 9 '13 at 19:17

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