Net Use Error on Windows Performance Monitoring

Hi All

I'm trying to set up some Windows Performance Monitors using dT 4.1. The only problem is, the collector is giving me the following error:

Connecting to the host 'pdc-cpwr-dtc01' caused exception: Unable to add net use connection. Please check if the host is reachable and the requested Performance Counter is available. Detailed error message: Multiple connections to a server or shared resource by the same user, using more than one user name, are not allowed. Disconnect all previous connections to the server or shared resource and try again.
 (System error code: 0x4C3)
Connecting to the host '<HOST NAME>' caused exception: Unable to add net use connection. Please check if the host is reachable and the requested Performance Counter is available. Detailed error message: Multiple connections to a server or shared resource by the same user, using more than one user name, are not allowed. Disconnect all previous connections to the server or shared resource and try again.

 (System error code: 0x4C3)

The documentation seems to point out that the collector service must be running with permissions to open net use connections:

The default installation sets up the collector service to run as LocalSystem user which is not allowed to open any remote connections.

You need to change that to a different user that is allowed to open net use connections

Now the situation gets tricky because it is a production server. So the question is, if I change the permissions of the collector service, will the collector need to restart? If so, will the agents automatically connect back once restarted or will they need to be restarted too?

All machines are running on Windows Server 2008 (R2).

Thanks for your help in advance :)

Josh