Just bought LR6 upgrade and installed it on my Windows 8 64b machine but it wont start although I never had any problem with versions 3, 4, 5 and all their upgrades.
First, I have to say I was very surprised by the messy setup. All along the way it seems I'm installing the CC version. I double-checked that I had bought a LR6 and it seems normal as I see others have the same experience on the web. The setup also completely failed to detect my LR 5.7 install (in standard folder) and requested my LR5 license number that I had to find back on the box in the attic. Lucky I didn't throw it away.
Anyway... Now install is finished but LR6 won't start because it complains mfc110u.dll is missing : see screenshot
I noticed there was a new "Adobe Installation" icon on my desktop and thought maybe that was a 2-step install so I started it. It downloaded loads of stuff and now the icon has been replaced by a beautiful "Adobe Creative Cloud" icon (wtf ?). I started it, only to discover that Lightroom CC ( ! ) was installed and "up to date" : see screenshot ... good, but LR still won't start.
I checked on the web and it says the missing file is part of a Windows Visual C redistributable. I realized those often come in both 32 and 64-bit, and I didn't see a dual 32/64-bit distinction in the distribution as usual.
I went back to check the downloaded files and noticed the "payload" subdir contains several ( ! ) versions of the redistributables, 2008-2010-2012, each in both 32 and 64b. So I guess the VC2012-64 is installed.
Went to see in the "Programs and Features" control panel only to find out that Adobe has installed ALL MS redistributable files in BOTH 32 and 64 bits ( ! ) : see screenshot . Note that the 2013 x64 version it installed is older than the one I had, and it even succeeded in installing the same 2012 x64 version a second time.
Now I admit I don't know what to do... It seems others have had a Similar problem with Dreamweaver, but the "solution" leaves me in doubt : uninstall ALL MS redistributables, uninstall DW/LR, reinstall MS redistributables (which ones ? I probably have other programs depending on some of them), then reinstall LR !
Has one of you encountered the same issue ? Any help is welcome...
OK, after a bit of reading, I thought there may be no harm in reinstalling only the 2012 64b redistributables, so I downloaded the latest version from MS, and uninstalled the two ones I had and reinstalled the package.
All of a sudden, Lightroom now accepts to run :-) Great !
Thinking more, I realize that the uninstall procedure was in English while I downloaded and installed the one corresponding to my OS language (French).
So maybe an explanation is that redistributables included with LR6 are English only and not suitable for international Windows versions...
Anyway, it's solved for me, and hopefully it can help others...
Thanks! Your suggestion worked perfectly! All the best, Jonas
You're welcome :-)