Does the database server start properly?
Have you checked if the dependent services (sap<SID>_xx, saposcol) start fine?
It could be that you have a corrupted "Service Manager" or that the account you are using does not have the appropriate privileges on the system.
You can start SAP manually, though.
Open a command prompt session and change to the "run" directory where all the SAP executables reside and run:
pf=\<SAPLOCALHOST>sapmnt<SAPID>sysprofileSTART_DVEBMGS00_< SAPLOCALHOST > SAPDIAHOST=<SAPLOCALHOST>
It's all one command.
You need to replace SAPLOCALHOST and SAPID with the real values, of course.
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