Have done some further research and came across this interesting article
(below) -
Thanks very much!
I did wonder if that may be the case but they seemed to co-exist quite
happily before
Thanks for your help
Pete
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Many recent anti-virus programs include anti-spyware coverage, and thus (at
Microsoft's recommendation) disable Windows Defender.
AVG is one vendor which has done this in a recent release.
During the installation of AVG 9.0 products, the Microsoft Windows Defender
application will be automatically turned off.
Windows Defender is not removed from the computer, only disabled
Please note that this is important to prevent conflicts between AVG and
Windows Defender. As they are both security applications, they will try to
check files you are working with. Since they will do that at the same time,
conflicts may arise. These can cause freezing, crashes or slowdown of
computer. It is generally not recommend to use more than one security (real
time protection) product on one computer.
Ǝиçεl
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