Garry, I had a similar problem and it works now. Here is what went down. I had built a brand new machine from scratch, installed Windows XP, then a few of my favorite programs, like DVD burning software, Winamp, Ashampoo CD copier etc.
Once I installed Hoster full version, which was the last item I installed, all of sudden my Plextor 760A is no where to be found. Same error, No DVD/CD drives found. I tried everything I knew, including downloading 3 different versions of ASPI drivers and installing them. None of them worked.
I reformatted the drive and did a fresh install of OS and software and did the exact same thing and same result. After installed the Hoster, DVD burner was offline. I checked the hardware monitor and it said it had problems with drivers. I reinstalled all the ASPI drives, fudged around with registry and nothing worked.
So, instead of doing it all over again, I started to reinstall other software after that, including Winamp, Ashampoo, etc. and bam it worked. I have no idea why it started to work. Only thing I can suspect is that the Hoster corrupted the ASPI driver with it's own and when I reinstall the othe software, somehow it installed the right ASPI driver after.
Right now it's working so I am not touching it. However, it was an interesting and perplexing problem to solve.
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