The Windows search EDB file can become large and fragmented after years of indexing.  The easiest way to reset this back to the beginning and free up space is to delete the file and let Windows start indexing again.  To do this:

Open a command prompt as and Administrator

Type the following commands:

net stop “Windows Search”

del %PROGRAMDATA%\Microsoft\Search\Data\Applications\Windows\Windows.edb

net start “Windows Search”

Please note: This is a “QUICK SUPPORT” article. The information contained herein is provided as is. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. More than likely specific steps may be missing and it could very well be assuming you have an advanced understanding on how to complete certain steps.