Windows Defender won't Turn-On

[garsymon]

Hi All

My laptop is a Sony VGN-AR51M running Vista and MS Office 2007.

While surfing info in last 24hrs I got what may be a spoof warning about virus infection. I ran a virus scan nothing detected.

Recently changed virus protection to Microsoft Security Essentials (foc) when Bullguard expired.

Days later I noticed Windows Defender turned off.

When trying to turn it on the following error message is displayed "0x800705b4.

Is this something I need to fix or not?

Any advice will be greatly appreciated

[Bojskov]

My computer an VPCZ13V9E-X has the same problem and i think this is very stranges. A window appear when i turn my computer on, and it says that Windows Defender is turn of. I can clic at a button to turn it on, - but nothing happens.

I have also tried to remove Windows Defender, but i can't do that becourse it sems to be a part of the windows XP Pro installation.

Is there anyone which can help us solving this problems?

best regards

bojskov

[Thalamus.]

Recently changed virus protection to Microsoft Security Essentials

Hi garsymon,

welcome to Questions & Answers..:smileyhappy:

During the installing of some, if not most AV application, including Microsoft Security Essentials, Windows Defender is deactivated to prevent conflicts..

[Bojskov]

Hello thalamus.

Thanks for your helpfulness.

Unfortunately I do not think it s problem because I have already tried deleting the Microsoft Essential. Of course I have also edited the registry.