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Some months ago I have my windows 7 aero effect enabled, and there is no problem. But now I have problems when using aero effect (I mean aero theme).

  1. First when using aero theme, minimizing windows take a long time, windows halt for some seconds like 7 or 10.

  2. The second problem is after minimizing windows(sometimes), my windows automatically change into classic theme and show me a message saying "The memory is not enough, to boost performance switched to classic theme", even though I have 4 GB ram installed and no extensive CPU usage.

This happen no matter whether applications are opened or not. But I created a new user account and found out that the new account is working perfectly well in aero theme. I don't know why. And in that new account ALL SHORTCUTS didn't load the graphics, just the white spaces. Please give me solutions.

share|improve this question
Silly solution, but did you check for viruses? There are seriously some viruses which just like tease the user with such kind of anoying things. – Mixxiphoid Sep 12 '12 at 7:43
What sort of graphics hardware do you have? – Karan Sep 12 '12 at 17:47
@Karan Graphic Card is ATI RAdeon HD 4330 512 MB. – Zack Sep 13 '12 at 3:07
Type "adjust perf" in the Start Menu search and press Enter. Have you changed any of the settings on the Visual Effects tab? If so, try resetting back to defaults. Also try sfc /scannow (see for help), and make sure your graphics driver is up to date. – Karan Sep 13 '12 at 3:23
@Karan I don't think that is the problem with visual effects tab, though i use to change it by tune up utilities. Also if it is system file problem there should also be problem in the new account, but it worked perfectly. – Zack Sep 13 '12 at 3:35

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