I have Lightroom 5.7 running on a PC, 8.1 Windows op system. Lightroom 5 opens and I can get to the library but when I try and import more pictures for a new collection, it hangs up and I get a message: "Adobe Photoshop Lightoom 64 has stopped working. A problem caused teh program to stop working correctly. Windows will close the program and notify you if a solution is available." I never hear back (of course) from Windows or Microsoft. Would it help to eliminate all the other collections I have on Lightroom? It seems to be happening more and more that Import hangs up and won't operate. It is longer than just the pause while it looks for sources on my several external drives. Thank you!