SQL Server 2008 R2 Setup Very Slow

Hi,

We have a multi-node SQL Server 2008 R2 Failover Cluster.

 I've noticed that the SQL Server 2008 R2 Setup is extremely slow and that it appears to only be using 1 of the 128 "CPUs" (i.e. in Task Manager).

We use this for creating new cluster groups and alike.

Is this tool only single threaded and is there a way to increase the performance? Our CPUs are 2.something GHz, we have 512GB of RAM and fast local disks.

Thanks