LinkFixer Advanced can be installed on a server, workstation or laptop. It can be installed on a physical or virtual machine.
LinkFixer Advanced runs in your data center, not as Software as a Service (SaaS).
For details on hardware and software requirements, see the knowledge base article located here:
What are the minimum system requirements for LinkFixer Advanced?
LinkFixer Advanced should be installed and run in the same data center as the data being processed, and in the same location as the MS SQL Server being used to store the data.