How to re-enable aero effects in Windows 7 after it has crashed?

"Restart DWM with (by using a CMD shell window with Administrator permission):

net stop uxsms
net start uxsms

It's the same service that crashes and is also known as the Desktop Window Manager."

For me, when that happens I also have a wrong screen resolution. After I set it to the right resolution, in the Settings I can chose Aero as the Design again.

Neither of the aforementioned ways made my Aero restart, but after looking at a microsoft help page -- which suggested checking if Aero is broken on another user account as well -- and logging into that other account, Aero worked on my "normal" account as well.
Neither of the aforementioned ways made my Aero restart, but after looking at a microsoft help page -- which suggested checking if Aero is broken on another user account as well -- and logging into that other account, Aero worked on my "normal" account as well.

The best answer doesn't work for my pc running Win7 32bit. A straight way I find is bringing up resolution adjust window, choose 'advanced', choose 'monitor', change the bottom combo box of 'color', normally this is set to 16bit so that Aero peek options is disabled. Change it back to '32bit' and aero peek is back.