Windows 7 SP1 was recently released by Microsoft. Due to an unfortunate timing coincidence, we will not be able to officially qualify Win7 SP1 for use with SolidWorks 2011 SP03, which is due to be released soon.
If you are on SolidWorks 2011 SP03 or earlier, we recommend testing Win7 SP1 in your own environment (network, PDM, addins, graphics cards/drivers, anti-virus, etc.) before deploying it on production or mission critical systems.
Early indicators on our internal Win7 SP1 tests are tracking healthy so far, and barring any major unforeseen issues, we expect to announce support for Win7 SP1 with SolidWorks 2011 SP04.
1. Win7 SP0 will continue to be supported for the lifecycle of SolidWorks 2011.
2. SolidWorks 2010 will not be officially qualified for use with Win7 SP1. You may certainly install Win7 SP1 for use with SW2010 and report any issues found, but those issues will likely be fixed only in SW2011 SP04 or later.