How do I remove MS Sercurity Essentials

Windows XP and Office 2003 with Frontpage 2003

Installed MS Security Essentials months ago and have been happy I have had no viruses.

The problem is… I can’t do updates and now I find I get a message that says my MS programs are non Authenticated. It won’t let me fix problems by reinstalling.

I have the original Office and Frontpage disks …. no help.

I purchased the discs from an authorised MS Business.

It seems I either need to remove MS Essentials or Authenticate.

What are your suggestions?

Thanks