[The Cajun]

My new one is a Toshiba Qosmio about 2 weeks old.
I was running XP on my old machine with MSE.
The Toshiba came with Norton, one of the first things I did was to get Windows Defender up and running and uninstall Norton.
Also installed Malwarebites free and Kaspersky TDSSkiller also free, to keep an eye on Windows Defender.
I run them once a month to make sure nothing slipped through on Microsoft.
Never had a problem with MSE, don't expect problems with Windows Defender.

Oh, while I was setting up and had only Norton running, it let a bunch of adware/malware through, Malwarebites cleaned it out.
Setting up Windows Defender became my priority after that, no further trouble since.

[dhs12345]

Thanks for the pointers.

I'll probably continue to run XP with free Norton from Comcast. I wonder if you can only install pieces of it. The system performance feature is a waste of resources. I think that it has a back up program too.