Dell Latitude D630 will supports 'windows-7, 32 bit OS' ?

Hi shameer shaik,

Welcome to the Dell Community Forum,

Since it was the Windows Vista which was shipped along with the computer , hence Windows 7 OS can be installed through OS disc as Clean Re-Installation.
We recommend you to click on the link below to run the Windows 7 upgrade advisor and check the compatibility for your computer
http://dell.to/17dfIYX

Click on download option and it will give you the information about Windows 7 Operating System compatibility for your system.
Here is a list of Operating Systems mentioned below which are supported by Dell Latitude D630 computer.

Windows® XP Pro SP2
Windows Vista™ Home 32-bit
Windows Vista Business 32-bit
Windows Vista Business 64-bit
Windows Vista Ultimate 32-bit
Windows Vista Ultimate 64-bit
Novell® certification n Series

Let us know if this helps.

Unofficially it can run Windows 7 32 bit use the drivers here:

http://en.community.dell.com/support-forums/software-os/w/microsoft_os/4544.latitude-d-series-windows-7-unofficial-drivers.aspx

Also see Windows Reinstallation Guide/A Clean install of Windows 7 (link in my signature) which will guide you through the installation.