1. If you get the ‘Stopped working’ message when accessing Folders that contain pictures/videos, it can sometimes be cured by going to Control Panel > All Control Panel Items > Folder Options > View Tab and put a tick in ‘Always show icons, never thumbnails‘.
2. Look in the Action Center for any issues. Go to Control Panel > All Control Panel Items > Action Center or right-click the icon in the Notification Area (bottom right of screen). In the main window, click the drop-down arrow to the right of Maintenance where you can select View Reliability History. In View Reliability History, right-click on any Windows Explorer errors and View technical details, which may be of help.
Also, at the bottom, click View All Problem reports and Check for Solutions.
3. If the above doesn’t help, the problem is sometimes caused by a third-party extension. ShellExView can be useful to see which shell extensions have been introduced into Explorer. Read about it then scroll down near to the bottom to download the x86 (32-bit) or x64 (64-bit) version here
http://www.nirsoft.net/utils/shexview.html
When you run it, click on the column labelled Company to alphabetically sequence the entries. You have to assume that the Microsoft entries are bona fide, so concentrate on the third-party entries. Is there anything listed that is either unnecessary or unknown? If so, highlight it and click the red spot (top left) to disable it. There shouldn’t be too many of them but you may find it easier to disable them all, then re-enable them (green spot) one at a time and try Explorer until the culprit is found.
4. If the issue still hasn’t been resolved, read about and then download, unzip and run Process Monitor version 3.1 (it doesn’t need installing), from here
http://technet.microsoft.com/en-us/sysinternals/bb896645.aspx
Because of the huge number of activities, it can be made easier to understand by de-selecting some of the activities. The activities can be toggled on/off by clicking them on the right-hand side of the Toolbar, they are Registry, File, Networking, Processes/Threads and Profiling. Also, click Autoscroll on the Toolbar to see the current real-time events.