- If Windows Media Center is running, close it.
- Click Start
- In the Start Search box, paste or type regedit.
- In the Programs list, click regedit.
If you are prompted for an administrator password or confirmation, type your password, or click Continue. - Locate and then click the following registry subkey:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Media Center\Settings\DvdSettings - In the details pane, right-click ShowGallery, and then click Modify.
- Delete the contents that appear in the Value data box.
- In the Value data box, type Gallery, and then click OK.
- Close Registry Editor
How to enable the DVD Library in Windows Media Center on a Windows Vista-based computer
Installing ArcView GIS 3.3 on Vista
When installing ESRI’s ArcView GIS 3.3 on the 32-bit version of Microsoft Windows Vista Ultimate, the following dialog box instantly appears:
It looks pretty bad. Even the title says it’s a severe error! You have to remember, this product was developed back in the Windows 95 days. 
There is an easy workaround. Open Windows Explorer and browse the contents of your ArcView CD-ROM and right-click on setup.exe. Click on the Compatibility tab, and click the checkbox next to “Run the program in compatibility mode for:” and leave the Windows XP (Service Pack 2) as is. Now click OK at the bottom of the dialog box to apply the changes and close the box. Double-click on setup.exe and your installation will begin.