According to this forum post, SW2011 SP3 was not qualified with Win7 SP1 in time for its release. SW is planning for qualification in a later service pack and is basically telling users to run at their own risk.
Our IT department would like to roll out Win7 SP1 along with SolidWorks 2011 this June. Please help us understand the level of risk we would be taking assuming that SP3 will be the latest available SP when it comes time to finalize our image on 4/25/2011.
Solidworks