Unstable internet connection in the evening

Hi and welcome to our community ​@Amila!

A blinking wifi light usually is a sign of activity, so that shouldn't be a problem. Wifi is wireless, obviously, and the signal travels through the ‘air’: this means that the signal is sensitive for disruptions caused by other signals and wifi networks in your environment. This is why there isn't one solution that always fixes problems with a wifi connection. 

Did you test your internetconnection with a cable? And does that work as it should? This is the best test to check if your connection and modem are OK.

For improving your wifi connection, try our Wifi Manager. This is a servicetool that helps you to check your whole connection and will help you improve wifi. It is in Dutch though, so I hope you're able to translate it.