Hello ivan099, welcome.
You can manually arrange desktop icons, however, any other icons within folders are auto-arranged and cannot be altered by direct access. You can arrange them in a multitude of different ways by right clicking open space (within a folder) and selecting Sort By > More...
A problem was discovered in Windows XP when users would accidentally manually arrange folders and icons and, in turn, they would overlap eachother. For simplicity's sake and for performance reasons, this feature was removed.
There are a number of 3rd-party programs that exist that allow you to do this, however, they would of course not be supported by Microsoft.
I would search the internet for 'File Manager', 'Alternate Shell', or something of the like. You may find some support forums that have users that specialize in just the exact thing you are looking for.
Hope this helps,
Thanks!
Ryan Thieman
Microsoft Answers Support Engineer
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