Disabling network security and relying solely on MAC address filtering is insufficient for securing a wireless network, as MAC addresses can be spoofed. WEP encryption is easily compromised, while WPA-PSK offers better security, though it is not foolproof. Additional measures like disabling SSID broadcasting and changing the network name can enhance security. It is advisable to uninstall third-party software associated with Linksys routers and use built-in operating system utilities for wireless configuration, as the Linksys software can cause connectivity issues. Users have reported better experiences when relying on Windows' native network management instead of Linksys software.