vcenter service is not working . what is problem ?
The first thing to check is access to the vcenter database -
there could be thousands of reasons for the problem.
you have to give us more input to serve you with ouput
first of all check the event log. what is he saiing?
restart vcenter service again and review vpxd.logs from C😕ProgramData\VMware\VMware VirtualCenter\Logs directory.
lookout of latest errors in the last of this log file and let us know what are those errors.