It's not the disc, it's the license.

An OEM license basically means you get zero tech support from M$. If you buy a Dell, Dell installs from an OEM license. Any tech support is from Dell, who is the OEM.

If you buy a packaged version of Windows, it comes with at least minimal support from M$, hence why it costs more.

An OEM license is also restricted to one installation. That means it can be installed once and only once. You can't even do a wipe and reinstall on the same computer.

A commercial license will allow reinstalls on the same hardware. You can even get multi-computer licenses - one disc allows installation on up to X computers, typically 3 is what I've seen. Of course, more $$$$. An OEM version can be bought for less, but you might not be able to reinstall again in case of problems. I've heard stories of M$ being 'nice' about it, but it's not guaranteed.

I have a full license for my copy of XP Pro. Paid for it, too. I mean in the sense that it cost more. But I chose that option knowing about the differences in licenses.

I've only had to reinstall XP once, and I had no argument from M$ in getting it authorized.

I can understand software makers' desire to curb piracy, but many an expert opinion (and mine) agree that this method does more harm than good. My question is, if piracy of Windows is such a major problem, how did Bill Gates become worth over $70 Billion? All that piracy doesn't seem to be hurting the pocket book too much, eh?

And this is just the tip of the iceberg regarding "digital rights management" and what you are allowed to do with the stuff you buy. For example, Adobe has moved to a monthly license "rental fee" for their software.

Brian