How to recover hidden files on U disk under win7

First:
1. In the Windows Explorer's "Tools" menu, click the "Folder Options" command; click “ View & rdquo; Tab;
2. Under “Hide files and folders>, select “Show hidden files and folders" radio button; click “OK”. This method is the easiest. If the above steps are followed and the file does not respond, it may be caused by the EXPLORER.exe virus.
Try the second method:
Start--Run--regedit-- HKEY_LOCAL_MACHINEsoftwaermicrosoftwindowscurrentversionexploreradvancedfolderhidden, there are two primary keys nohidden, showall, the binary key values ​​CheckedValue and DefaultValue under nohidden are set to 2,showal l Set CheckedValue to 1 and DefaultValue to 2;
Addition of the second method: If it is still not useful, then delete the CheckedValue key under the showall primary key, and create a new one: Right click - New -Dword value - Name it CheckedValue, then modify its key value to 1, so you can select "Show all hidden files" and "Show system files".