How to enable folder options
Malware often comes itself as a hidden file and then disables the Folder Options menu in Windows Explorer so you can't change the settings to view hidden files and folders. If you are unable to access the Tools --> Folder Options in Windows Explorer, here's how to modify the registry to regain access to the Folder Options menu.» Click start --> run
» Type "regedit" in the text box --> OK
The registry editor will opens.
» Navigate to the following on the left pane
HKEY_CURRENT_USER --> Software --> Microsoft --> Windows --> CurrentVersion --> Policies --> Explorer
» In the right pane look for the value "No Folder Options"
» Right click on it and select Delete
»
Click "Yes" for the confirmation message "Are you sure you want to delete this value?" »
Again go to the left pane and navigate to the following HKEY_LOCAL_MACHINE --> Software --> Microsoft --> Windows --> CurrentVersion --> Policies --> Explorer »
Right click on it and select Delete »
Click "Yes" for the confirmation message "Are you sure you want to delete this value?" »
Close the registry. Note : If you still cannot access Folder Options, you should reboot into Safe mode and repeat above steps. 
