I went through all this a few months ago, and I thought to come back now to see if the purchasing problem was fixed with Windows2000/XP.
At the time, we went through all possible combinations of software and hardware, the closest we got to it was a Network driver, the way purchasing MJ worked, and Windows steadfastly refusing to bend to this intruder of software,protecting itself by rebooting. We could get Windows to bluescreen by turing on Diagnostics and to see what the problem was. The file was ndis.sys, I think, it was the one reported to have caused the bluescreen. Seemed odd it would blue screen when working with a non windows product.
MJ can only be bought through this absurd mechanism within itself, and despite the number of installations that exhibited this problem, it was deemed "not worth pursuing" since MJ could not replicate it. Mind you, the amount of machines with this problem, looking through the lines here is significant.
Conclusion: I gave up on MJ totally and bought Sound Forge. It works, & works well!!