How to move Windows from one hard drive to another?

I have a desktop PC with multiple SATA ports on the Motherboard, two USB drives, two SATA cables and two (internal) hard drives:

• 1x 250 GB SATA HDD, contains C: with Windows installed.


• 1x 500 GB SATA HDD, empty.

I want to move Windows from the smaller to the bigger hard drive to utilize the additional space.

The data on C: is not critical, I'm willing to go without a backup.

Ideally the process would not require additional devices and would involve open source software only.