Windows 7 installation hangs/black screen

As suspected it is wrong. When you chose to make the second partition without consulting us you apparently applied the Active command which caused the installer to write the System boot files to your data partition.

Nothing was written about making a second partition, it should have been done in Disk Mgmt after install. The Diskpart commands to create an Active partition are only an attempt to troubleshoot a failed install on the C partition.

To correct this mark C Active in Disk Mgmt, reboot into Win7 installation DVD to run Startup Repair - Run up to 3 Separate Times until C is marked System Active Boot.

If problems persist read back over the steps to get a perfect Clean Reinstall - Factory OEM Windows 7 to see what you may be doing wrong, or work through these Troubleshooting Steps for Windows 7

I reinstalled the whole OS and it's working fine now and I don't get any black screens (I turned the pc on and off 12 times to be sure that it doesn't appear). I followed your instructions and created only one partition (50GB) for the system. Could you give me instructions on how to create the other partition?

Partition or Volume - Create New

Thank you for helping me with the installation!

You're welcome. :) Enjoy Win7.