When you open the Windows Live Photo Gallery Screensaver settings dialog, theme controls may be missing and the message "This computer’s video card can’t play themes" is displayed. You might be knowing that the themes in Windows Photo Gallery slideshow as well as in Windows Live Photo Gallery screensaver won’t be enabled if the Graphics card score (Windows Experience Index) is less than 3.0.

Interestingly some users reported that this message was displayed in their systems although the Graphics card score was above 5.0. I worked on this issue for an hour or so, and thought I’d write my observations, solution & a workaround here. The problem seems to occur if Windows Live Photo Gallery is unable to query the Graphics card score for some reason.
First step is to update your Windows Experience Index rating.
Update your Windows Experience Index Score
Login as Administrator (or equivalent.)
Open Control Panel, click System and Maintenance, and then click Performance Information and Tools.
Click Update my score. The assessment will run for few minutes.

After assessment is complete, open Windows Live Photo Gallery Screensaver settings page to see if themes are enabled. If not, try the following step:
Registering the WinSATAPI.dll file
Open an elevated Command Prompt. To open an elevated Command Prompt, click Start, click All Programs, click Accessories, right-click Command Prompt, and then click Run as administrator.
Register the WinSATAPI.dll file by typing the following command and pressing {ENTER}:

You should see the following message:

Never mind about the error code 0×80070716. Restart Windows, and then open Windows Live Photo Gallery Screensaver settings page to see if themes are enabled.
Workaround
If none of the above steps work, you may use the following workaround. Setting the Windows Experience Index manually fixes the problem in most cases. It’s the same old WinSATScore registry value which comes to the rescue. But wait! You’ll have to implement the registry value in a different registry branch.
Creating the "WinSATScore" Registry Value
Click Start, type Regedit.exe and press {ENTER}
Navigate to the following location:
Right-click on the key, and create a new DWORD (32-bit) Value, and name it as WinSATScore

Double-click WinSATScore, select Decimal, and set the value data to 300 (or higher.)

Exit the Registry Editor.
The Windows Live Photo Gallery Screensaver settings page should now show the theme controls.

Here you see all the themes in the dropdown.

If the WinSATScore registry value exists, the Windows Live Photo Gallery screensaver won’t take the strain to query the Graphics card score using Windows Experience Index API.
Good luck, and enjoy the Screensaver themes!
Related Posts
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- Free Windows 7 Desktop Themes and Backgrounds From Microsoft
- How to Access the Hidden Themes in Windows 7
- Welcome Screen Appears When Resuming From Sleep or Screensaver Mode in Windows 7 and Windows Vista
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Thanks man!!! you’re the best
Cheers mate much appreciated. Worked for me.
Thank you. The WinSATScore worked for me.
Thank you you’re the best!
None of these solulations not work for me. Any other ideas? Very frustrating.
Thank you so much, this solution help me solve my issues…keep up the good work
My problem is the video I’ve set as a screen saver only shows the video, not the sound. Is this what is supposed to happen? Is there any way to adjust things so the sound plays as well?
Worked fine for the Live Photo Gallery.
I have the same issue with Windows Media Center in Windows 7 64bit edition.
Pan & Zoom worked fine in Windows7 32bit edition on the exact same PC. On 64bi OS i can choose Pan & Zoom for slideshows but it has no effect.
Thank you!! You’re amazing :D