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Nirsoft has a software called "LastActivityView", which basically grabs all user activities from registry, event logs, etc.

Among all those activities, there is one "View Folder in Explorer". This records time, filename and full path that every time a file is viewed in Windows Explorer, dated back to the day Windows was installed. As the software itself doesn't record these, there must be somewhere these info are stored by Windows Explorer.

However, after a bit google search, I cannot find any useful information on this issue. This is not about address bar history, recent folders or Internet Explorer history.

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Here's a tip: backup/export the Bags and BagMRU subkeys of HKEY_CLASSES_ROOT\Local Settings\Software\Microsoft\Windows\Shell, HKEY_CURRENT_USER\Software\Classes\Local Settings\Software\Microsoft\Windows\Shell and HKEY_CURRENT_USER\Software\Microsoft\Windows\Shell, then delete them and restart Windows. Does the app still find anything? – Karan Nov 25 '12 at 0:31
up vote 0 down vote accepted

Windows Explorer remembers the settings (position, size, column positions, and so on) for every folder you open by storing it under the following registry keys:

HKEY_CURRENT_USER\Software\Classes\Local Settings\Software\Microsoft\Windows\Shell

Nirsoft LastActivityView uses the above registry keys to add the View Folder in Explorer event. If you delete the subkeys under the above registry keys (With RegEdit), Windows will "forget" the settings of all folders.

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