Windows Search can't find my installed apps for some reason even though all of the relevant shortcuts are in my C:\ProgramData\Microsoft\Windows\Start Menu\Programs folder. For some reason the icons got removed, but the shortcuts remained valid, and after moving them to another folder and moving them back, they re-acquired their original icons. What causes this? Why can't my search find my Firefox or any installed app on my start menu? I even pinned them to Start.