So, I bought and downloaded FS9-737-600 and when I try and install it, I get an error message about no valid FS9 registry location.I even emailed PMDG, with no reply, and am wondering if this is a common or easily fixable error.I am running Windows 7, if that makes a difference?

So, I bought and downloaded FS9-737-600 and when I try and install it, I get an error message about no valid FS9 registry location.I even emailed PMDG, with no reply, and am wondering if this is a common or easily fixable error.I am running Windows 7, if that makes a difference?

FS9-737-600 -> I guess you are talking about the PMDG 767-600 package?Try using this:http://www.flight1software.com/files/FS_Registry_Repair.exePMDG has it's own forum (here at AVSIM), just for the info. And welcome.

I 'm almost 100% sure the tool that Word Not Allowed has suggested will fix your problem, then go and enjoy that 37.