Faulting application name: EXCEL.EXE, version: 15.0.4745.1000, time stamp: 0x55a4b64a
Faulting module name: EXCEL.EXE, version: 15.0.4745.1000, time stamp: 0x55a4b64a
Exception code: 0xc0000005
Fault offset: 0x0001eefc
Faulting process id: 0x2d28
Faulting application start time: 0x01d0df8131fa713f
Faulting application path: C:\Program Files\Microsoft Office 15\Root\Office15\EXCEL.EXE
Faulting module path: C:\Program Files\Microsoft Office 15\Root\Office15\EXCEL.EXE
Report Id: e7f75c95-4b82-11e5-8260-40e23099761f
Faulting package full name: 

This has happened multiple times while working in excel on different spreadsheets. What could be causing this? It's is causing loss of information.

• Moved by Michael ShaoMicrosoft contingent staff Thursday, August 27, 2015 7:07 AM Excel related

Click Start > Control Panel.

• Click Programs > Programs and Features.

• Click the Office product you want to repair,  and then click Change.

  Note  If you bought a suite like Microsoft Office 365 Home or Microsoft Office Home and Student 2013, search for the suite name. If you bought an individual Office application like Microsoft Word, search for the application name.

• In Office 2013 and Office 2016, click either Quick Repair > Repair or Online Repair > Repair. In Office 2010, click Repair > Continue.

• Ref:

https://support.office.com/en-US/Article/Repair-an-Office-application-7821d4b6-7c1d-4205-aa0e-a6b40c