How to rebuild icon cache in Windows 7

This issue can occur by corrupted icon cache. To fix the issue, please rebuild icon cache.

1. Click the Start button, and click Computer .
2. On the Tool bar, click Organize and choose Folder and Search Options .
3. Click the View tab, and check to select the Show hidden files and folders option , and click OK .
4. Then, enter the following directory:

%USERPROFILE%\AppData\Local

5. Find the IconCache.db file, and rename it as IconCache.db.old.
6. Close the window, and restart the computer.
Ref. http://social.technet.microsoft.com/Forums/windows/en-US/bea47202-d869-4155-8c8f-2a5b8bd7be1d/forum-faqhow-to-rebuild-icon-cache