after install latest Lightroom 2015 CC, many crashes. Very slow start for Lightroom. If I select MAP module, Lightroom immediately stops working. PC with Windows 10 Pro 64 bit.
If you are on CC 2015.2, I suggest to roll back to 2015.1.1: http://www.lightroomqueen.com/how-do-i-roll-back-to-lightroom-2015-1-1-or-lightroom-6-1-1/
There are many confirmed issues with 2015.2 that are currently being fixed.
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In addition, make sure to have the latest graphic driver for your card installed.