So two out of every thousand searches results in a page containing malicious sites.

There will always be some malicious sites that will keep doing this.

A lot of malicious sites open and close very rapidly.

So let's step back a little bit and understand how that works first because the idea would be you browse to a malicious site.

Or what's even more disturbing, a web ad is served by a malicious site.

The way that happens is you've got scripting on your browser, or you visit a malicious site.

A malicious site may also use a element and javascript to "frame" the content.

They can also look at the bookmark list and report on supposedly "malicious" sites.

Independent testing of the malicious site blocking shows that the block list is limited.

You shouldn't - a serious vulnerability has been discovered which would allow a malicious site to read files on your machine.