I've used many of the main vendor's' security products over the years, more recently trying AVG and Avast! suites, both retail and free versions, some with more stability/upgrade troubles than others.
I found the previous MSE version to be simple to install, and painless to keep up to date due to its tight integration with the built-in Windows Update procedures (with daily or on-demand updates). It interacts seamlessly with the Windows Firewall and other Windows components.
It raised a warning every month or two that was easy to understand and respond to. I think several of the warnings were false positives (I've got heaps of developer tools on my machine, and it's no wonder that the odd executable or two in that lot would appear to MSE to be highly suspect).
There were also one or two warnings that proved to ne real malware - no matter how careful you are, sooner or later some nastie or other is bound to make its way to your system - which MSE appropriately quarantined and subsequently deleted.
PLEASE READ ON '¦
I 'm quite fussy about software that I rely on, but don't hesitate in recommending MSE 2.0 to you. I reckon you'll like it a lot.
Pretty well done, Microsoft! A nice Christmas present for us all.
But I certainly won't be heaping such glowing praise on other aspects of Windows nor on various other Microsoft desktop products. I'm having a love/hate relationship with them, Windows 7 included.
It's strange that one one hand Microsoft have come out with some really excellent software (like Visual Studio 2010, and Windows Live Writer which I use to prepare iTWire articles and my own blogs), while others are rather ordinary in one way or another (such the very limited configurability of the user interface of Internet Explorer versions 7, 8 and 9).
So I'll say more about this in coming iTWire articles.
UPDATE: I forgot to add above that you should not rely on a single anti-malware tool like MSE, but install several differernt ones that will each do things a bit differently and cover gaps left by the other tools.
Every fortnight or so I also update and run the Microsoft Malicious Software Removal Tool and maybe do a full on-demand scan using MSE.
Remaining secure is a hard slog, but you owe it to yourself -- and everybody that you interact with, so that you don't pass on any infections -- to be consistent and persistent.