We have already blogged about the difference between 32-bit and 64-bit Windows. This post tells you how to find out whether your computer is running a 32-bit version or 64-bit version of the Windows operating system.
Type system in Windows 7 start search.
In the results which appear, click on System Information, you will get information about whether it is a 32-bit or a 64-bit based PC. Alternatively, you could also open Control Panel > All Control Panel Items > Performance Information and Tools and click on View and print detailed performance and system information.
If under the Control Panel listings you click on System, you will get to see here the System type. That is whether its a 32-bit or a 64-bit Windows. Alternatively you can also click Control Panel > System and Security > System to open it.
But if you are too lazy to do even this … Microsoft has introduced a Fix it 50525 for you!
Just download it from KB827218 and run it …
… it will open the appropriate Control Panel window for you, where all you will need to do is move your eye-balls a bit to see whether its a 32-bit or a 64-bit operating system!