OCA recommends Microsoft Anti-Spyware
I had to crash out of MSN Messenger as it had hung on a dialog while selecting a new display picture. I sent an error report, and in response I got redirected to the Windows Online Crash Analysis site, which included the following paragraph:
* This problem might also be resolved by installing and running an anti-spyware program. We recommend Microsoft® Windows® AntiSpyware, which is currently available as a beta release. You can find out more information here: http://www.microsoft.com/athome/security/spyware/software/default.mspx
Somehow I don't think this is an appropriate place to advertise another Microsoft product.