Thanks for your comments.
The good news is Version 6 uses the same definition as version 5.
I’m happy not to update at least for a while since even if it will run smoothly on Windows 2000 no doubt ver 6 has a greater demand on resources.
Both systems have 512MB RAM which once was considered good but now low.
Without an expensive 512MB PC133 SODIMM I can’t upgrade the laptop.