Umm, are you talking about the "About:Blank" that can appear in your browser (Case on the left)? Cause if so, that's just the window name used when you setup your Internet Options (on right) to start with a blank page.
About:blank is a known bug (we are not talking about the About Blank blank website in your browser setup)
This is a spyware usually running in c:\windows\system32 and is usually a DLL file
Please Google about:blank for more info
Ah - I don't and never have and never would use IE. FF all the way. And that doesn't appear in my browser (cuz I refuse to use IE), it always comes up when NoScript blocks something and I look at the options to allow what I need to allow to make it open if I want, then it's listed in there as one of the things NoScript is blocking.
And - that's THE big reason I come to this website, cuz I 'spect most all of you gentlemen know more about all this than I do. ; -)
AND I appreciate your time and efforts on my behalf!!