After the Download of Windows Defender I cannot install the product?

Having issues installing Windows Defender on my XP machine. I will get 3/4 of the way into the install and its crashes saying i don't have enough privileges, however i am the admin????

I have attached the screen shot!
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ConUladhConnect With a Mentor Commented:
Found this on MS forums:

> When trying to install Windows Defender, I was getting the following error
> "Service 'Windows Defender' (WinDefend) failed to start. Verify you have
> sufficient privileges to start system services."

> My problem was due to Spyware or a virus. I got rid of the Spyware by using
> AVG and MalWareBytes but was still not able to install Defender (also I had
> never had Defender installed on the PC).

> Here is how I fixed it:
> Searched the Registry for any "Defender" entries. Found an entry under
> "HKLM\Software\Microsoft\Windows Defender". When I tried to delete it
> (Windows Defender folder) I found I could not due to not enough rights. So I
> right-clicked the folder selected "Permissions" for this folder and gave the
> Administrator FULL rights (it had only READ). I was then able to delete this
> registry folder.After this I was able to install Windows Defender without any
> problems. I believe that the Spyware or virus I got added this entry to the
> registry to prevent me from installing Windows Defender.

Also check out this:
Try runng the following AV / Malware utilities as I have seen malware change the registry to prohibit the installation of Windows defender:

Malware bytes -
HijackThis -

If everything is clean then try:

Do you have any other security products installed?
Are you on SP3?
Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

That last post should have read how about security essentials?
Hi Friend,

1. Go to C:\Program Files\Windows Defender
2. Run "MSASCui.exe"
3. You will see a window saying that Windows Defender is not running. (Sorry, I don't remember the exact wording)
4. Click on the part at the end of the message that looks like a link and says something like "start Windows Defender"

That should do it.
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