Until last month, for 4 years I had used Comcast/Xfinity Residential Internet with my D-Link DIR-645 router for my home wifi without any problems. My wifi was stable and reliable and I didn't have to restart the router once due to wifi issues in the whole of those 4 years. Life was good.
Then last month I switched to Comcast Business for my internet provider. They provided me with a new modem but I continued to use my D-Link DIR-645 router for my home wifi so I did not expect any issues. But since the change my wifi is constantly going out, I have to restart the router nearly every other day!
It makes no sense to me since I didn't change the router so I have no idea what is going on.