I have a Dell 4600 and upgraded from my failing original SATA 120GB to a Seagate SATA 300GB (ST3300631AS). I use Dantz Retrospect 7.5 to backup to a Maxtor external USB drive. I used Acronis Easy Migrate 7.0 to clone the drives. Every time I tried to backup, Retrospect would say "preparing backup" then I would get the blue screen of death (BSOD) error saying "Bad_Pool_Header Stop: 0x00000019".
Here is the fix and it works brilliantly: I found it on
http://www.wilderssecurity.com/showthread.php?t=176066&page=4
1. Go to windows Device Manager
2. Click "view" and select "show hidden devices"
3. Scroll down to "storage volumes"
4. Click on the plus to expand.
5. Click on each one listed and right click and uninstall. (you will get a message on some staying to reboot before it takes effect. Select no until you do them all.)
6. Reboot.
7. Wait till windows automatically reinstalls devices. Will prompt to reboot again.
8 Reboot.
Now it should work.
The problem was they got corrupted using DiscWizard and Acronis (which is the DiscWizard engine). There are other explaination at that site, but the above works WITHOUT A REINSTALL OF WINDOWS OS!!!!