Why Lightroom can't open RAW files?

I have Lightroom 2.7 (last update), I can't open RAW photos from my camera Nikon D7000.

Try Lightroom 4 or above (4.1)
Or upgrade ACR (Adobe Camera Raw)

You need Adobe Camera RAW 6.7 and Lightroom 2.7 is too old for that version - THEREFORE your software is out of date… If you have a proper version of Lightroom (instead of a pirate version) then upgrade…

or you DNG to convert…

or use the software that came with the camera and convert…

Your version of Lightroom is too old.

You need at least Lightroom 3.6 or better 4

You can buy the upgrade for under $80 on line from Adobe

You are now seeing why pros carp on the cost of doing business using digital cameras. We're constantly needing to upgrade our $5, 000 + camera bodies, computers (faster and faster CPU's with more and more RAM and huge hard drives -- I have three 2 gb drives on my Photoshop work station) and updating our software. In the old days, the client paid for our film and processing and all we needed was light table and a computer that could run a simple word processor, create invoices and run a data base