How to check if Windows 8 and 8.1 is 32 bit or 64 bit

1. Right-click on the Start Screen icon on the lower left corner of the screen. 
   

   

2. Left-click on System. 
   

   

3. There will be an entry under System called System Type listed. If it lists 32-bit Operating System, than the PC is running the 32-bit (x86) version of Windows. If it lists 64-bit Operating System, than the PC is running the 64-bit (x64) version of Windows. 
   

   

Windows 8.1

1. Right-click on the Start icon on the lower left corner of the screen and click on System. 
   

   

2. There will be an entry under System called System Type listed. If it lists 32-bit Operating System, than the PC is running the 32-bit (x86) version of Windows. If it lists 64-bit Operating System, than the PC is running the 64-bit (x64) version of Windows.