Hello Mike,
Welcome to the site.
Sorry for the delay in a response.
I did a search on Google for "zeroing out hard disc" without the quotes, and many useful websites are shown. Please try this yourself. If you can't get the help you need, come and post again and I will try to get you some more specific details.
For popup blocking I use and recommend to you Agnitum Outpost Firewall [free edition] and My Internet Exporer2 [free].
http://www.agnitum.com/products/outpost/http://www.myie2.com/Best regards, Bill