Should I install this? Why is there a license agreement to install it
and it is not installed like other patches? Does this cause problems?
I already use Mcafee because it is free for using ATT as my ISP.
It's a one-shot scan for "high-runner" malware. Microsoft monitors
the most popular malware (the ones with high propagation), and creates
a definition file to match. Then, when Patch Tuesday comes, and you
get your updates, you get that month's definitions. It means you're
not doing anything remotely resembling real-time protection. It's mainly
for people who don't maintain their computers, and Microsoft is trying
to reduce the "zombie" population of computers with malware running.
Effectively, a short scan that runs, because you happened to do
Windows Update.
The tool can also be run manually. I think when it runs automatically,
it might just sweep the system folder. I don't think it looks at the
entire C:. Running it manually, may give a slightly more thorough
scan, but then the definitions it has loaded, don't cover everything.
Considering how many zombie and uncared-for machines there are,
it's a good idea. It improves the situation slightly, for
Microsoft's ability to "pour water on the worst fires" without
completely solving the problem.
Paul