MM&M UG UK

OK, so not strictly Exchange install, more W2008 clustering question.
Is there any way of setting the cluster service to run as a user account rather than local system account?
I have tried, but each time I try and restart the service it fails saying I do not have the necessary permissions.
The account is a local administrator and a domain member. It also has log on as service privileges to the server. ANy pointers would be appreciated.
Thanks all

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"What happens if I untick this?"

For anyone stumbling across this post. Services can be set to use a user account, but not critical services such as clustering. This is to do with the new security principles in 2008 (Most users see it as the User Access Control function in Vista and above) which stops a malicious code hi-jacking a user account.

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"What happens if I untick this?"