What should be done if the router login password is lost?

The recommended action when the router login password is lost is to use the hardware reset function. This option typically involves pressing a physical reset button on the router, which restores the device to its factory settings. By doing this, the router's configuration, including the password, is cleared, allowing you to set a new password during the initial setup process. This approach is straightforward and effective for regaining access to the router.

Reinstalling RouterOS is not necessary for recovering a lost password. While it might seem like a solution, it often involves more complex steps and does not specifically target the lost password issue. Similarly, contacting the ISP may not yield results since they generally don’t have access to your device’s passwords or configurations. Utilizing recovery software is also not applicable in this scenario as it pertains to file recovery rather than password recovery on a network device. Thus, using the hardware reset function is the most efficient and practical solution for this situation.