Windows could not start the Server service on local computer Error 193:0xc1

Hello,

Not able to start Server (lanmanServer) Service in Windows Server 2008 R2 

Its a VM and on logging into the Server it sometimes shows as started and then will stop by itself,

If we try to start manually it always gives the error --Windows could not start the Server service on local computer Error 193:0xc1

All dependent services are fine and running ,did sfc,did copy svchost and svcsrv.dll files from a working Server of same.but no help,no shares of this server are accessible since this service is not running

on checking the event log its shows an error "Server is not a valid win32 application"

Please help

Thanks and Regards

Jose