This is addressed in the Server Fault FAQaddressed in the Server Fault FAQ and I don't think the accepted answer here is correct.
Server Fault is for system administrators and IT professionals, people who manage or maintain computers in a professional capacity. If you are in charge of ...
- servers
- networks
- many desktop PCs (other than your own)
... then you're in the right place to ask your question! Well, as long as the question is about your servers, your networks, or desktops you support, anyway.
Please note that Server Fault is not for general computer troubleshooting questions; if you paid for that desktop hardware, and it's your personal workstation, it is unlikely that your question is appropriate for Server Fault.
Server stuff is generally appropriate. This is the best rule of thumb for non-server stuff: if it's a desktop PC, and you paid your own money for that desktop PC, it's unlikely your question is a good fit for Server Fault.