Remove Windows Version from Desktop

1.Click on "Start", then "Run.." and type "regedit".
2.Navigate to the registry key:
"HKEY_CURRENT_USER\Control Panel\Desktop".
3.Once there, locate the DWORD value "PaintDesktopVersion".
4.Right click on it and select Modify.
"0" removes Windows version from desktop.
"1" adds  Windows version to desktop.
Reboot

A description of the differences between 32-bit versions of Windows Vista and 64-bit versions of Windows Vista

Architecture	Windows Vista, 32-bit versions	Windows Vista, 64-bit versions
System requirements	1-gigahertz (GHz) 32-bit (x86) processor or 64-bit (x64) processor, 512 MB of RAM	1-GHz 64-bit (x64) processor, 1 GB of RAM (4 GB recommended)
Memory access	A 32-bit version of Windows Vista can access up to 4 GB of RAM.	A 64-bit version of Windows Vista can access from 1 GB of RAM to more than 128 GB of RAM.
Memory access per edition	All 32-bit versions of Windows Vista can access up to 4 GB of RAM.	Windows Vista Home Basic - 8 GB of RAM Windows Vista Home Premium - 16 GB of RAM Windows Vista Business - 128 GB of RAM or more Windows Vista Enterprise - 128 GB of RAM or more Windows Vista Ultimate - 128 GB of RAM or more
DEP	32-bit versions of Windows Vista use a software-based version of DEP.	64-bit versions of Windows Vista support hardware-backed DEP.
Kernel Patch Protection (PatchGuard)	This feature is not available in 32-bit versions of Windows Vista.	This feature is available in 64-bit versions of Windows Vista. Kernel Patch Protection helps prevent a malicious program from updating the Windows Vista kernel. This feature works by helping to prevent a kernel-mode driver from extending or replacing other kernel services. Also, this feature helps prevent third-party programs from updating (patching) any part of the kernel.
Driver signing	Unsigned drivers may be used with 32-bit versions of Windows Vista.	64-bit versions of Windows Vista require that all device drivers be digitally signed by the developer.
32-bit driver support	32-bit versions of Windows Vista support 32-bit drivers that are designed for Windows Vista.	64-bit versions of Windows Vista do not support 32-bit device drivers.
16-bit program support	32-bit versions of Windows Vista support 16-bit programs, in part.	64-bit versions of Windows Vista do not support 16-bit programs.

Vista Has Missing Desktop Icons and Documents

I came across this issue yesterday and wanted to let you know what I found and how you can go about fixing this.  The computer I saw this on was running Windows Vista but I imagine it could also happen on windows 7 or XP.  Anyways, I found that the laptop had a virus and this virus had hidden all the desktop, documents, and other files and folders to make it look like you had lost everything on your computer.  The first thing you need to do is make sure your anti virus program is up to date and run a full scan.  After that you should also go to http://malwarebytes.org/ and downloand and run a full scan of this also.  Once you know for sure you have gotten rid of the virus and or malware you can now download unhide.exe fromhttp://download.bleepingcomputer.com/grinler/unhide.exe . Download this program and run it.  It may take sometime to run but once it’s done you should hopefully be able to see your files on the desktop and under the Documents folder.  **NOW GO BUY A BACKUP DRIVE AND BACKUP YOUR DATA!**.  You will have hopefully learned a lesson here and realize that you got lucky but next time it could be worse.  So please go buy a backup drive or use a service such as Mozy and backup your data today.

I hope this helps you as it can be a really scary to turn on your computer and think you have just lost everything