Files on your PC that are encrypted are not, by default, indexed by Windows Vista. This makes searching for an encrypted file rather slow and laborious.
If you want encrypted files on your PC indexed, then proceed as follows:
1/ Click the Start button
2/ From the Start menu, Click Control panel
3/ In Control Panel, Click the Indexing option (if you are using the Control Panel Home display then you need to click System and Maintenance>indexing options)
4/ in the Indexing Options window, Click the Advanced button
5/ Because you are making alterations to the system, the User Account Control (UAC) will kick in and prompt you for Authorisation. if you are the Administrator then simply Click the Continue button. If you have a Standard user Account, you will need the Administrator password to continue
6/ The Advanced settings window will now appear
7/ Within this window you will find a section marked 'File Settings'
8/ Look for the 'Index encrypted files' option and Click on the Checkbox. This will place a 'tick' in the box to enable the option
9/ Finally, Click OK