Best practices have always recommended against doing an upgrade install of a new OS. Instead do a fresh install. This prevents a lot of problems.

I also agree with Steve. I believe taht Microsoft will only provide an upgrade option for W2K and XP.

Computers, which have been running W98, ME or NT are probably not upgradeable to even XP, let alone Vista. New hardware will be required for optimum performance.

How many of these systems can handle 1 - 2 GBs of RAM or have a large enough hard drive or a suitable graphics card?

Obviously, if you are going to get new hardware, then you will want to go for a dual core motherboard and a 64 bit system.

Cheers,

Linda