I imported RAW photos to lightroom and it immediately said that all 50 photos were missing. I'm very new to lightroom, please tell me what I am doing wrong.
From where are you importing them from?
What option is checked at the top of the import dialog window? Copy as DNG, Copy, Move or Add?
Please review some of these tutorials to get the basics of using LR.
I have seen this happen before, it can happen if you are importing using ADD and the photos are on the camera card. If you care importing from a camera card, you must use COPY and select a Destination folder on one of your hard disks.