Student editions have watermarks and expiration dates. Blocking the host file does not remove the watermark. It only breaks the license check, causing the software to crash after 30 days.
To better understand how to manage files and connectivity in SOLIDWORKS, these videos provide walkthroughs on fixing references and server communication: How to Fix SOLIDWORKS File References Hawk Ridge Systems Solidworks Host File Block
If you are a network administrator, you may want to these for legitimate users. Student editions have watermarks and expiration dates