Hello,
Thank you for posting your query in Microsoft Community.
To arrange icons by name, type, date, or size, right-click a blank area on the desktop, and then click Sort by. Click the command that indicates how you want to arrange the icons (by Name, by Type, and
so on). If you want the icons to be automatically arranged, click Auto Arrange under
View. If you want to arrange the icons on your own, click Auto Arrange to remove the check mark.
Also, Refer to the suggestions provided by Corrine on October 7, 2009
http://answers.microsoft.com/en-us/windows/forum/windows_7-desktop/windows-7-desktop-icons-keep-rearranging/a7e8f091-1f2b-44fc-90ba-8d873b5d872d
The desktop (overview)
http://windows.microsoft.com/en-ca/windows/desktop-overview#1TC=windows-7§ion_1
For issue with Games:
I would like to update you that some of the games require specific resolution and that is probably the reason the games are not working. However I would suggest you to update the latest graphic drivers from the manufacturer website and then check if that
makes the difference.
Automatically get recommended drivers and updates for your hardware
http://windows.microsoft.com/en-ca/windows7/automatically-get-recommended-drivers-and-updates-for-your-hardware
Hope this resolves the issue. If issue persists, you can write back to us and we will be glad to assist you further.