Thanks for posting on Adobe forums.
Could you please tell us exact error that you are getting in Lightroom 6 ?
if possible please share the screenshot also.
The issue is likely LR interrogating the video driver capabilities for use in Develop and there is a bug in the video driver that causes LR to hang.
One way around most of these driver-related problems is to turn off the GPU in LR / Edit / Prefs / Performance / Graphics Acceleration.
Since you cannot even start LR to get to LR / Prefs you will have to turn off the GPU usage manually as shown in this Adobe help document:
Hi sspregel, Thanks so much