Hi @Sooraj_Suresh 

Thank you very much for your reply.

Oddly enough, the repository database service eventually started again and QSR db on Postgres started to respond (standard Postgres installation on the central node).

I am sure sure why/how it suddenly started working again - probably some delayed response from the first issue where my C drive was full.

I suppose the lesson here is to always make sure the drive where the repository.exe service lives always has space and do not let it get full up!