Internet Explorer 8 takes longer than expected to start: (spybot impact)

Something already know, and which I related to Microsoft, as soon as the final version came out.
This behavior was not found in Release Candidate.

I also must say that it is not a strict issue with Spybot - Search & Destroy. It happens if people add, at least, more than 10000 entries to the Internet Explorer 8 Security Zone. It could be our own customizable list, IE-Spyad, you name it.

I was told they were going to try to solve this issue, but, it seems Microsoft decided not to, and to blame the author of Spybot, and other alike mechanisms we may use.

I remember to see mentioned by Microsoft that they considered Spybot's preventive measures to be somewhat useless, considering that malware, or most of it, is constantly changing domains. While it is true for many, it also true that it won't for many other malware out there.

But, such preventive measures being useless, then why is Microsoft also blocking access to malicious domains? Makes sense?