What version of MC12 are you using?
Did you reboot after uninstalling?
Is your Install Key new (less than 14 days) and does it match the version of MC?
Did you try a search for PlaybackEng.dll to make sure there wasn't another?
12.0.179 from top of forum, same one I have on my Vista computer where it works fine
Yes, I rebooted several times after installing and reinstalling.
I restored each time, using a restore from each, 12, then 11, then 10, so the Install Key should have been minutes old as I did in interactively by going to the web site, pasting my reg code, and letting it activate.
I currently have all versions uninstalled, and there is NO playbackeng.dll on that computer. On my Vista PC, where I have 11 and 12, I have two playbackeng.dll's, one in each place like there should be, I guess, both work fine. I have both because I had to install 11 to get the upgrade price for 12 last week!!
I am going down there right now and trying it again. I'll download again so I have a known good download, I'll install, reboot, try to restore a license if that's what I have to do. I'm uncertain if the license is in the registry some place where it'll know about it or what. I'll use the mjr file send 2/22.