All of the machines on our Small Network (35 hosts) are exhibiting the same issue today. Internet Explorer 11 crashes immediately on starting.

The relevant event viewer entry from my own system reports:

Faulting application name: IEXPLORE.EXE, version: 11.0.9600.17631, time stamp: 0x54b31a70

Faulting module name: IPSEng32.dll, version: 14.1.2.8, time stamp: 0x54545048

Exception code: 0xc0000417

Fault offset: 0x000c4c92

Faulting process id: 0x23b4

Faulting application start time: 0x01d04da86caa10f2

Faulting application path: C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE

Faulting module path: C:\ProgramData\Symantec\Symantec Endpoint Protection\12.1.1101.401.105\Data\Definitions\IPSDefs\20150220.001\IPSEng32.dll

Report Id: aa8fbcd9-b99b-11e4-a79a-e8039ade38e0

The same faulting module is reported the other systems.

Any idea how this can be resolved?