How To Tell if I Have 32-bit or 64-bit

Windows Vista, 7 and 8

  1. Right click on the Computer icon, either in the start menu or on the desktop, and select Properties.
  2. Under the System heading, find the System type field.
  3. System type will be listed as either 32-bit or 64-bit.

Windows XP

  1. Click the Start button.
  2. Click Run... to open the run dialog.
  3. Enter msinfo32.exe and then click OK.
  4. Under the System Summary look for the System Type field.
  5. An x86-based PC is 32-bit. An x64-based PC is 64-bit.