The common reasons why WiFi keeps disconnecting include several key factors:

• Weak signal strength, often due to the router being too far away or placed poorly, reducing coverage.
• Router issues such as outdated firmware, overheating, or hardware malfunctions.
• Interference from other wireless networks or household electronic devices like microwaves and cordless phones.
• Network overload from too many devices connected at once, leading to congestion.
• Modem or ISP outages and spikes in network traffic.
• Problems with the device's WiFi adapter, including outdated drivers or hardware faults.
• Power instability or fluctuations affecting the router.
• Security vulnerabilities or malware infecting the router can also cause connectivity issues.

Steps to fix include restarting or power cycling the modem/router, updating firmware, moving closer to the router, checking cables for damage, reducing the number of connected devices, and ensuring strong WiFi security and up-to- date drivers on devices.