Windows Vista : Show hidden files and folders option missing

Hi,
I'm having windows vista ultimate version. From yesterday there is no no option for "Show Hidden Files and Folders" in the Folder Options dialog.
Please help how can i make my hidden files visible?

thanks

This happens if the system is infected by Virus or other Malware . Run a system scan with good antivirus.

Open regedit.exe through the start menu search or run box, and then navigate down to the following key.

Quote:

---

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\explorer
\Advanced\Folder\Hidden

---

Look for a key named Type on the right-hand side and change the value to group . If the key does not exist, create a new String value.

You should be able to immediately re-open the folder properties, and the option should have returned.

Refer this similar thread http://forums.techarena.in/vista-help/1041284.htm