As of the date of this entry the installer for Drumagog is still having issues with windows Vista. To get around this try these steps:

1) Make sure you are logged on as administrator.
2) Double click on "Computer" and then on the C: drive.
3) Open the Windows folder.
4) Right click on the "WinSxS" folder and choose properties.
5) Click on the "Security" tab.
6) Click on "Advanced"
7) Go to te "Owners" tab.
8) Click on "Edit".
9) Select Administrator as new owner.
10) Check the box that says "Replace owner on subcontainers
and objects".
11) Go back to the "Security" tab.
12) Click on "Edit" to change permissions.
13) Select "System" from the top list, and check "Full Control"
on the bottom list.
14) Press "OK" Reboot the computer and install Drumagog.