Windows 7 Aero Peek option is not available

[Xylon]

i Have a little problem with Aero Peek of windows 7. when i try to use aero peek options that is not available no selection appears only name present but cant use it .

i Can turn it off using the registry ... but it does not help as its not work
Why are those options not available? some one can help me ?
thank you

[timon]

Ensure the following services are running:
- Desktop Windows Manager
- Themes

(Control Panel > Administrative Tools > Services).

Aero Peek enables you to preview windows by dynamically bringing them to the top of the pile. But now it's been added to Alt + Tab so you can preview full content of each window when cycling through them

[need Tos]

It may be due to problem of video card supports also can be DirectX so check that you have proper drivers that work for your card. if not then update latest driver from web

[Gusgr8]

there is lots of version available online and each have different problems and bugs in case 6801 build is quite stable so check for your windows version and i think you should get this official setup check here
Download Windows 7 RC