Delete stored wifi networks from command line:
netsh wlan delete profile name=* i=*
quickie command to return the serial number (pre Windows 11 24H2)
wmic bios get serialnumber
Update:
C:\Windows\System\wbem\wmic.exe has been removed from Windows 11 24H2.
Powershell command Windows 11 24H2 and older
get-wmiobject -namespace root/CIMV2 -class Win32_bios | select -expand SerialNumber