Help Getting Strange Popups


Android Question

Hi all.
Now recently I've been getting this really strange popup always asking me to download 360 Security, it randomly pops up on the home screen. I haven't downloaded any dodgy apps recently or downloaded anything off the web. I've tried various Virus/Malware software and don't find anything. I downloaded some Adpush apps some crashed midway and some found apps that I've used for ages to be the problem.

I deleted some apps that I thought might cause the problem but it still happens. It's slightly worrying and no idea how to get rid of it.

Here is a picture of my problem -