One immediate action would be to disable all screen and power savers. Determine if doing so makes some difference.
What troubleshooting commands have you tried?
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Look in Reliability History/Monitor and Event Viewer for any error codes, warnings, or informational events just before or at the time the wireless options dissapear.
Reliability History/Monitor is easy to use and the presented timeline format (Days/Weeks) may reveal patterns.
Event Viewer requires more time and effort to navigate and understand.
To help with Event Viewer:
How To - How to use Windows 10 Event Viewer | Tom's Hardware Forum (tomshardware.com)
Check Windows History for any failed or problem updates.
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Make and model modem, router, or modem/router if combined?
The router's log (if available and enabled) may provide some clue. Who has full admin rights to the router? You will need help from that person.
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Run "ipconfig /all" (without quotes) via the Command Prompt.
Copy and past the full results here.