I can't update the Windows Defender definitions and get this message: the program can't check for definition updates. Error: Code 0xc8000408.

Impossible to find info on what this means or what to do so I can again update in Windows Defender. This error message has begun to appear recently, or at least I think. I thought it was set to automatic update, but when I tried to do it manually because it says it's expired. Tried several times but get the same message every time.

You are welcome. Your computer must NOT be connected to the internet or networks without a fully functional antivirus, completely update installed application. But first, let's take care of any Norton "leftovers"...

1. download the Norton Removal Tool, save it to your desktop: ftp://ftp.symantec.com/public/english_us_canada/removal_tools/Norton_Removal_Tool.exe

2. close all open applications (that is, anything with an icon on the taskbar).

3. click right on the file saved in #1 above, and then select run as administrator to run the utility. DO TAP not your keyboard until the race ends, then restart.

Now, you will need to download/install an antivirus application. While I do not recommend professionally AVG, you might find that AVG Free 9.0 more compatible if you choose a CUSTOM this time installation above and don't install NOT of Linkscanner Search-Shield, Active Surf-Shield, security or the email of crawl components toolbar.

Why you don't need your anti-virus to scan your email
   http://thundercloud.NET/infoave/tutorials/email-scanning/index.htm

Otherwise, I can recommend Microsoft Security Essentials*, Avira AntiVirand Avast (all free) and NOD32 and Kaspersky (not the suites 'internet security'). After you have installed your AV application selected, manually & repeatedly updated until you get one invites 'no more updates'.

[Avoid Norton & McAfee IMHO applications.]

=============================
* Microsoft Security Essentials (MSE) includes components of antivirus and antispyware protection. The latter will replace (and must turn off automatically) Windows Defender in Vista.

~ Robear Dyer (PA Bear) ~ MS MVP (that is to say, mail, security, Windows & Update Services) since 2002 ~ WARNING: MS MVPs represent or work for Microsoft

Tags: Windows

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