Looks like you are using Version 5.0 of Lightroom. Update to Lightroom 5.7.1 as there is no sense in trying to analyze a problem in a really OLD version.
I am having the same problem. Tried several times, both with and without exporting negatives. Here is my event viewer log:
Faulting application name: lightroom.exe, version: 18.104.22.168, time stamp: 0x545ea461
Faulting module name: ui.dll, version: 22.214.171.124, time stamp: 0x545ea18f
Exception code: 0xc0000005
Fault offset: 0x00000000000159ce
Faulting process id: 0x2234
Faulting application start time: 0x01d069dabcd22d53
Faulting application path: C:\Program Files\Adobe\Adobe Photoshop Lightroom 5.7\lightroom.exe
Faulting module path: C:\Program Files\Adobe\Adobe Photoshop Lightroom 5.7\ui.dll
Report Id: 719c14b6-d5cf-11e4-8283-6002924260db
Faulting package full name:
Faulting package-relative application ID:
Both you and the OP have some type of hardware problem. More than likely a memory problem. Fix that and LR won't crash anymore on exporting.
I already ran an extensive Memory Test which found no errors. No other program is crashing. And lightroom is only crashing when trying to export. Looks like it's a Lightroom problem to me.