My apologies on the title. It's hard to put this symptom succinctly. Also, I wasn't sure if this belonged in the Win7 section or the upgrade hardware section.
I upgraded to a 1 TB WD HDD by cloning it with the supplied software (Acronis True Image WD Edition).
All went well, but the old drive had letters C and D (D being a recovery partition). I wanted the new drive to have them.
I couldn't rename them using disk manager, so I did so in regedit.
Once I did that, if I leave the old drive connected, I come to a screen that says my Windows 7 copy is not genuine.
If I disconnect the old drive, all is well. I was hoping to format it and keep it in as a secondary drive since it's a pain to physically take it out.
Thank you for any guidance you can provide!
HP Media Center PC
32 bit Windows 7
4 GB RAM
Intel Core2 Duo CPU, E6550 2.33GHz