How to stop annoying INVISIBLE POP UPS/AUDIO Ads? I’m constantly hearing these commercial ads when I’m connected to the internet; however, I can’t see where they are coming from. I will close out of all my web browsers (IE) and run my task manager and there will be nothing list there but I can hear it loud and clear. I have tried scanning Windows Defender but I just get this error message: Error 0x800070424 The specified service does not exist as an installed service'. (error code: 0x800704240) when i ran Hijackthis I got this message: for some reason your system denied write access to Hosts file. If any hijack domains are in this file Hijackthis may not be able to fix this. If that happens, you need to edit the file yourself. To do this, click start,Run and type: notepad c:\windows\system32\drivers\etc\Hosts and press enter. find the line(s) Hijackthis reports and delete them. Save the file as 'hosts' with quotes and reboot."