Aero problem...

Hi Stanley, welcome to Seven Forums.

Give this a go:
When Aero isn't working, right click your desktop and click "Personalise" at the bottom of the window that comes up, you will see an option that says "Troubleshoot Aero and other Transparency errors" (or something like that, can't remember the exact wording, and cant look as my Aero is working fine)

This will run the Aero Troubleshooter. It should at least, give you an idea of what is wrong and it may even fix it for you.

Post back with results.

That's odd....

Did you happen to see what the Troubleshooter said was wrong with Aero?

The Energy Profile's shouldn't be changing by themselves, that actually sounds to me like a loose connection in the power adapter. Is everything properly inserted? Does the problem stop if you unplug the laptop from the mains?

Next time it happen's (if it happen's again) run the Troubleshooter again and make a note of what it say's is wrong.

I suspect it was probably the DWM but that is purely a guess.

There could be any number of thing's and I wouldn't like to give you information on a guess.

As I thought, your DWM is randomly switching itself off. The troubleshooter should switch it back on again, but what we need to address is the fact that it is switching off in the first place.

Can you please fill out your System Specs as completely as possible so we can help you further. If you don't know them, try Speccy - System Information - Free Download to get the details.

Thanks for filling out your system specs. As it is a laptop can I assume it is an OEM build? (ie you bought it from a shop) what brand and model is it?