Mojave crashing every 15 minutes MacBook Pro
Upgraded to Mojave a few days ago and ever since computer is crashing every 15 minutes or so with no Apps running. Have upgraded to latest version released today still crashing. Had computer at Authorised Apple repairer who tested everything and could find nothing. He said it was software problem Mojave and in fact had had a few computers in with same problem since Friday. At my wits end. Any help would would be appreciated.