Saprouter fails with faulting application error

Our saprouter fails regularly at the top of the hour at 16:00, 17:00 and 18:00. It's like something is running that's killing it.

Get the following error -

Faulting application name: saprouter.exe, version: 7100.201.17.47443, time stamp: 0x4bfae3ce

Faulting module name: saprouter.exe, version: 7100.201.17.47443, time stamp: 0x4bfae3ce

Exception code: 0xc0000005

Fault offset: 0x000000000000c1f3

Faulting process id: 0xb84

Faulting application start time: 0x01cce922698a3d84

Faulting application path: d:\usr\sap\saprouter\saprouter.exe

Faulting module path: d:\usr\sap\saprouter\saprouter.exe

Report Id: ee05b50f-55d5-11e1-a40f-005056ae7028

Any help or ideas would be greatly appreciated.

Thanks,

Daniel