

If you've activated a Serato DJ Pro license or trial on your computer, and then swapped out the hard drive, or updated your BIOS, for example, this changes the Host ID of your computer.


My licenses won't activate, and I just see Error Code #4.

If you've activated a Serato DJ Pro license or trial on your computer, and then swapped out the hard drive, or updated your BIOS, for example, this changes the Host ID of your computer.
My licenses won't activate, and I just see Error Code #4.