Wireless Internet Connection Dropping Out

My wireless internet started frequently dropping out but worked fine for years beforehand.

I've followed the advice on Malware Tips and remove all malware, viruses etc but the issue is still occurring.
Does anyone have any ideas on what else I can do??

Does the internet stay on at the router? The most likely thing is a new router has come on close to and on the same channel as you and killing your connection. There are apps to see what channel is in use but you could go on the router and change your channel