Third-party "driver" sites are often riddled with malware or contain modified firmware that can "brick" your router (turn it into a paperweight).
A “new” firmware download for the DSL-124 typically includes: dlink dsl124 firmware download new
I can give more precise steps. Just let me know. Third-party "driver" sites are often riddled with malware
Assuming you found the right official file, proceed like a careful minor: read the release notes, back up your current settings, and avoid power interruptions mid-flash. Many routers give an option to save and restore configuration — use it. If the release notes mention a full reset requirement, expect to reconfigure PPPoE, VLANs, or custom DNS afterward. If you’re not comfortable with re-entering those details, schedule the update when you can spend ten to thirty minutes troubleshooting. back up your current settings