To
determine the version of Windows that is running on your computer, go to the
"Windows Vista or Windows 7" section, the "Windows XP"
section, or the "Windows Server 2003" section, and then follow the
steps in that section to determine the bit count of your operating system.
Windows
Vista or Windows 7
If
you have Windows Vista or Windows 7, there are two methods to determine whether
you are running a 32-bit version or a 64-bit version. If one method does not
work, try the other method.
Method
1: View the System window in Control Panel
1. Click StartCollapse this imageExpand
this image
,
type system in the Start Search box, and then click system in the Programs
list.
2. The operating system is displayed as
follows:
For a 64-bit version operating system, 64-bit
Operating System appears for the System type under System.
For a 32-bit version operating system, 32-bit
Operating System appears for the System type under System.
Method
2: View the System Information window
1. Click Start
Collapse
this imageExpand this image
,
type system in the Start Search box, and then click System Information in the
Programs list.
2. When System Summary is selected in the
navigation pane, the operating system is displayed as follows:
For a
64-bit version operating system, x64-based PC appears for the System type under
Item.
For a 32-bit version operating system,
x86-based PC appears for the System type under Item.
If
you cannot determine the operating system bit count by using these methods, go
to the "Next Steps" section.
Windows
XP
If
you have Windows XP, there are two methods to determine whether you are running
a 32-bit version or a 64-bit version. If one method does not work, try the
other method.
1. Click Start, and then click Run.
2. Type sysdm.cpl, and then click OK.
3. Click the General tab. The operating
system is displayed as follows:
For a 64-bit version operating system,
Windows XP Professional x64 Edition Version < Year> appears under System.
For a 32-bit version operating system,
Windows XP Professional Version <Year> appears under System.
Collapsethis
imageExpand this image
Method
2: View the System Information window
1. Click Start, and then click Run.
2. Type winmsd.exe, and then click OK.
3. When System Summary is selected in the
navigation pane, locate Processor under Item in the details pane. Note the
value.
If the value that corresponds to Processor
starts with x86, the computer is running a 32-bit version of Windows.
If the value that corresponds to Processor
starts with IA-64 or AMD64, the computer is running a 64-bit version of
Windows.
If
you cannot determine the operating system bit count by using these methods, go
to the "Next Steps" section.
Windows
Server 2003
If
you have Windows Server 2003, there are two methods to determine whether you
are running a 32-bit version or a 64-bit version. If one method does not work,
try the other method.
Method
1: View System Properties in Control Panel
1. Click Start, and then click Run.
2. Type sysdm.cpl, and then click OK.
3. Click the General tab. The operating
system is displayed as follows:
For a 64-bit version operating system,
Windows Server 2003 Enterprise x64 Edition appears under System.
For a 32-bit version operating system,
Windows Server 2003 Enterprise Edition appears under System.
Method
2: View the System Information window
1. Click Start, and then click Run.
2. Type winmsd.exe, and then click OK.
3. When System Summary is selected in the
navigation pane, locate Processor under Item in the details pane. Note the
value.
If the value that corresponds to Processor
starts with x86, the computer is running a 32-bit version of Windows.
If the value that corresponds to Processor
starts with EM64T or IA-64, the computer is running a 64-bit version of
Windows.
If
you cannot determine the operating system bit count by using these methods, go
to the "Next Steps" section.
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