Hrmm, very strange Sanjog.
Could it be possible that the computer is going to sleep or some other power related setting is affecting it?
I have experienced poor performance when installing SAP on domain controller, but not a unexpected restart before.
It may be worth raising incident with SAP, making sure include the Event Viewer details and IBM's response.
Also as Nagarjan mentioned, make sure the PL being installed is supported for MS SQL Server 2014.
Also check the Platform/Hardware guides for compliance, if not checked already.
https://websmp106.sap-ag.de/~sapidb/011000358700000032462013E.pdf
https://websmp106.sap-ag.de/~sapidb/011000358700000244612011E.pdf
Kind Regards,
Nick Lakasas