Update SQL Server Express 2005:
For Windows 7 or newer:
For Windows Vista or newer:
If you are not sure which system type (64-bit or 32-bit) you are using:
- Select the Start Menu and right click on "My Computer", "Computer", or "This PC".
- Choose Properties.
- Look for "System Type", which will list the operating system as either "32-bit" or "64-bit".