Hi, While deploying Windows Defender via GPO, as a test pilot for our intranet, the error : "Application Faied To Initialize 0x8007005 Access Denied" popped up. Interestingly enough, Windows Defender installation was completed, however, it shows up the error before running for first time. Then, after few seconds, Defender started its automated process running normally. After that first time, the error never appeared again and further updates from WSUS are being deployed normally. Other .msi files deployed in the same fashioninstalls normally without incident. There was not much information on event viewer, and the logs for msi running process didn't show much either. I have been reading some of the postings from this website but, it seems not much of what I have read so far, has been of any help. Microsoft doesn't seem to have much information either. I would like to know if someone else has come across with similar situation and if any solution or answer was found. Thanks a lot

I am having the exact same issue, andhave not found a viable solution yet. I suppose that the only way to get around this is going to be to deploy it using a startup script.

check some of the solns from http://www.winvistaclub.com/tips.htmlif one is unable to update defender : 1) As far as Vista goes (don't know if this applies to XP) you can do this by clicking start > all programs > windows updates> change settings > uncheck Automatic Updates, Uncheck Recommended Updates and uncheck use Microsoft Update Service. this will switch from Microsoft Update back to using Windows Update. Reboot. If it works for you fine; you can now reset the update settings to as they were earlier. 2) I also came across this download from Microsoft (Vista/XP). This actually FORCES defender to update ! 3) To manually update Windows Defender visit Microsofts Malware Protection Center for instructions. 4) Lastly if none work, there is another way you can try this: Boot into safe mode. Find the folder named Software Distribution. Rename SoftwareDistribution to SoftwareDistribution.old OR Delete all its contents (FLUSH it !) Reboot. Now try to update the Defender (at this point a new SoftwareDistribution folder will be created if you have renamed it).