The Windows 7 index makes your searches faster by caching paths, but in some cases you may want to remove certain file types from this index to pre-filter your search results. You can do this via lusrmgr.msc - more below
1.Execute Run, type Control Panel and press Enter
2. Click Indexing Options
3. Click Advanced
4. Click on File Types tab and check/uncheck any and all file extensions that you want to index. Moreover if you are unable to find any specific file extension, add it by entering the extension and pressing Add. For example, doc and click on Add
1.Execute Run and type lusrmgr.msc and press Enter.
2. Now in the left pane, click Users and then right click Administrator in the right pane
3. Uncheck Account is disabled. This way you would be able to enable the admin account.