How to find whether a windows machine is 32 bit or 64 bit on a Windows XP ?

Start --> Run --> winmsd.exe

OUTPUT:



OS Name Microsoft Windows XP Professional
Version 5.1.2600 Service Pack 3 Build 2600
OS Manufacturer Microsoft Corporation
System Name ABC
System Manufacturer Dell Inc.
System Model OptiPlex 755
System Type X86-based PC
Processor x86 Family 6 Model 23 Stepping 6 GenuineIntel ~2826 Mhz
BIOS Version/Date Dell Inc. A10, 4/30/2008
SMBIOS Version 2.5
Windows Directory C:\WINDOWS
System Directory C:\WINDOWS\system32


32 bit System:

System Type X86-based PC
System Directory C:\WINDOWS\system32


64 bit System:

System Type ia64 or AMD64 -based PC

System Directory C:\WINDOWS\system64