Folks,For the MS tech article link on this subject to work please cut and past the whole url as the forum software doesn't recognize the whole address:http://support.microsoft.com/default.aspx?...kb;en-us;228985Sorry about that.

Where does this stuff come from? Is the moon full? There isn't any blacklist. Having installed any of the programs you have listed has nothing to do with the problem. It's a hardware issue. Or, rather, an issue of certain hardware not being able to cope with CD#4.Doug

This may helphttp://microsoft.com/downloads/details.asp...CE-1DF707D7A2E9Bill

Unfortunately this article is a catch-all fudge. I have this problem installing FS2004 AND UK VFR Scenry on a system that is unchanged and has been for at least six months.Not impressed.

I can't understand why MS uses this assinine form of copy protection. It just creates problems for their customers, and it's never long before a NO CD crack shows up and nullifies the copy protection anyway.David

Isn't it obvious. MS doesn't write software when it can steal it from someone else and tie up years in the courts, bleeding their competitors white in the meantime. And with that level of market share who gives a flying-whatsit about Customer Service!It's a great shame that justflight appears to have adopted the same wholly unsatisfactory method of copy-protecting their software.I have asked them the question and await a response.

Just do a Google search for Flight Simulator 2004 No CD Patch. It's just a replacement for FS9.exe (backup this file first) and should fix all your problems. And please don't accuse me of advocating Warez stuff, as this is on many reputable flightsim sites. Thanks.David

Cheers Dave,Chris.(If the Safedisc system worked as it is supposed to, we wouldn't have to consider taking such steps).