I am new to using Lightroom 5.5 on my laptop (upgrading only recently) and Windows 8.1 with latest auto upgrades. As soon as I attempted to import it crashed. I did have it working on 9th July. But I also tried to use LR 4.4 and had similar problems it also crashed with or without LR 5.5 installed. I tried all sorts of methods and failed including removing and reloading LR5.
But it is working on my desktop running Windows 7 with latest auto upgrades
It appears that I have a solution it is dear old Windows 8!!! It appears that Windows only auto upgrades essential upgrades NOT THOSE absolutely essential to get imports working for LR. Now these are loaded I can "import" pictures from my desktop pc. Laptop is only running LR5 at present so I am optimistic it might be solved!