To search for files in File Explorer, open File Explorer and use the search box in the upper right. Open This PC by swiping in from the right edge of the screen, tapping Search (or if you're using a mouse, pointing to the upper-right corner of t...
http://www.ebrahma.com/2013/10/search-for-files-in-file-explorer-windows-8-1-windows-rt-8-1/Labels: 8, 8.1, File-Explore, open-File-Explorer, search, Search-for-files-in-File-Explorer--Windows-8.1, Search-looks, window-8, Windows-RT-8.1