CS5 -- Acrobat 9 Pro disc not recognized

Question

PC, running Windows 7. I just installed CS5 Design Premium from the DVD and all seems to be well. Then I inserted the Acrobat 9 Pro disc. The drive spins for awhile, then I get a prompt to insert a disc (which is already inserted). Same thing happens when I insert the Content disc. Both discs are recognized on other PCs, and every other disc I have -- including the CS5 DP disc of course -- works fine in the same drive.
Any ideas on how to fix this?
Thanks, John

Answer 1

I hit the same problem except I had a Reader X installed not a pro version.  For me the solution was to really make sure that nothing else was running.  I followed the steps from http://support.microsoft.com/kb/2438651#reso2 the link is goofy so here is the pertinent text:
Programs that are currently running on your computer may be interfering with the installation processDisable programs that might be interfering with the installation process. To do this, follow these steps:
Click Start
, type msconfig in the Search box, and then click msconfig.exe.
If you are prompted for an administrator password or confirmation, type the password, or provide confirmation.
On the General tab, click Selective startup, and then click to clear the Load startup items check box.
Click Services, click Hide all Microsoft services, and then click Disable all.
Click OK, and then click Restart.
Try running your software program installation.
When you are finished troubleshooting the problem, restart the computer in Normal Startup mode. To do this, follow these steps:
Click Start
, type msconfig in the Search box, and then clickmsconfig.exe.
If you are prompted for an administrator password or confirmation, type the password, or provide confirmation.
On the General tab, click Normal startup, click OK, and then click Restart.