I have exact the same problem. It worked under LR 5.5, then suddenly it failed. Upgraded to 5.6 it worked for 1 day and now I have the same issue under 5.6.
This is what I have found in the event viewer:
Log Name: Application
Source: Application Error
Date: 27/08/2014 13:37:50
Event ID: 1000
Task Category: (100)
Faulting application name: lightroom.exe, version: 126.96.36.199, time stamp: 0x53ce7bf8
Faulting module name: KERNELBASE.dll, version: 6.3.9600.17055, time stamp: 0x532954fb
Exception code: 0xc0000002
Fault offset: 0x0000000000005bf8
Faulting process id: 0x1b7c
Faulting application start time: 0x01cfc1eb300a0ffa
Faulting application path: C:\Program Files\Adobe\Adobe Photoshop Lightroom 5.6\lightroom.exe
Faulting module path: C:\windows\system32\KERNELBASE.dll
Report Id: 926d2fd9-2dde-11e4-825f-7c7a911d3610
Faulting package full name:
Faulting package-relative application ID:
BTW.: this is happening on a WinTel machine.
I do have the same Problem with LR5.7 under Windows 7 64bit.
Cannot import any photos anymore. As soon as I try to import Photos LR5.7 crashes. Reinstalled the Programm (repair Programm) did not help, still the same Problem.
I my case the crash happened due to a connected Android Phone. After disconneting the Android Phone from the PC, the crash during Import did not occur anymore.
That worked!!I just did a search for the same problem and found this page. Unplugging my Android phone stopped the crash. I suppose the Library import is looking at the phone as a disk drive or something. Thanks for the answer!
Same situation on my Desktop but do not have Android. Application Error: Application Hanging Event 1002 Task cat. 101
Did repair & still hung. Deleted Lightroom & re-installed, still hung. Re-booted system, still hung. Have on Laptop with no problem (So far).