Tech”fixed” my laptop but now- how do i get my pictures BACK into Windows Essentials Photo Gallery as well as on my Photos APP (windows8.1)

Had to do a restore (but saved files- lost videos and some photos--- (tech was responsible but too late now) anyhow- saved SOME pictures - lost short videos of my dog- :( and re-installed Essentials- but not the whole program) so how do I get my photos that are left- (and future ones) into the photo gallery and also they're not on the photo app tile in 8.1 (laptop) w(hen I type photo  says no "photos" in this gallery-- or it shows the icon for photo gallery and opens-but  says no items match your search-- but when i type "pictures" they show up (what's left of them) on the screen but not in either application. TIA