Hi Arif,
Just to add what Andy has said.

I am using 3 computer one@office, desktop@home, and laptop@AtAllPlacesINeedToCarryIt.

one@Office:
Has Windows98 (Windoze98), most of my tools are DOS based with my own libraries) and never felt the need to change them to Windoze version. At present I am trying on the Keil-evaluation version, but it is still a long way to go (for me).

desktop@home:
2 partitions: Windoze98, WindozeXP.
WindozeXP for my kids (4yrs and 9yrs) to play games. Windoze98 to keep a backup and (if my kids permit to) do some programming using this desktop@home.

laptop@everywhere:
for on site programming, development, presentations, demos, etc.

But never felt the need to change my good old utilities to Windows version. Although I am keeping an eye on switching them to Linux based.

For windows based assemblers, I will see if I have them in my backups and will inform you about it.

Bye,
Mr. Kiran V. Sutar.