METHOD 1:
Go to the registry editor by running regedit in the run box. Go to this key : HKEY_CURRENT_USER\Software\Microsoft\Windows\Currentversion\Explorer\Advanced
In the right hand area, double click hidden and change the value to 1. Check it in u r tools menu if changes have taken effect.
METHOD 2:
1. Click "Start" -> "Run"
2. Type "regedit" & then click "ok"
3. Find the key :HKEY_CURRENT_USER\Software\Microsoft\Windows\Currentversion\Explorer\Advanced\Folder\Hidden \SHOWALL
4. Look at the "checkedvalue" key this should be a dword key. If isnt then delete the key .
5. Create a new key called "checkedvalue" as a dword with a value of 1.
6. The "Show Hidden Files and Folders" should now work normally !
