We can't download minecraft and we have already purchased it?

Your computer storage might not be big enough to download it. Have you made a account to log in with? Try another computer if so.

1. Is the purchased game for the machine you actually have.
2. Is there enough room to install the game on the machine you have (30% to 50% free.) Many games need more room for installation than they need to run. (housekeeping during set up).
3. You are using the correct code, and/or account.

Example: PC MINECRAFT
-CPU: Intel Pentium D or AMD Athlon 64 (K8) 2.6 GHz
-RAM: 4 GB
-OS: Windows XP or better
-Video Card: GeForce 66xx or ATI Radeon 9xxx and Up with OpenGL 2 Support (Excluding Integrated Chipsets)
-Sound Card: Yes
-Free Disk Space: 150 MB