SolidWorks Corporation's response to the need for improving the speed of service pack installations (by replacing SP2.1 with a "new" SP2.1) is appreciated; however, I have the following observations and questions: 1. Wouldn't it be in the best interest of SolidWorks Corporation and the 300,000+ user community for users to have been immediately and directly notified(via e-mail broadcast) instead of haing us rely upon chance visits to the support site and discussion groups or other "word of mouth" propogation? 2. The less the prior 2.1 service pack is used, the more valuable time will be saved! It seems as though policy is to inform only on an as needed basis. It's apparently similar to an automaker looking to avoid issuing a formal recall but fixing customer's cars as they exhibit problems, while the other owners slowly learn about the "silent" recall. 3. How can users tell the difference between the old and new versions of the SP2.1 files? As far as I can see, the file sizes, times and dates (contained in the self-extracting executables) are the same in both cases. Wouldn't it have been better for SolidWorks to issue an SP2.2? Perhaps it's assumed that most users have yet to download SP2.1 and, as a result, will obtain the newer, faster version, but the existing old copies of SP2.1 may be unknowingly propogated for use on many more seats than need be. 4. Can't the Windows Installer patches be made "intelligent" enough to verify (before upgrading time is wasted) whether the pre-existing installation of SolidWorks can in fact be patched? I, for one, made the mistake of repeatedly attempting to upgrade a downloaded version of SP2.0 to SP2.1 to no avail - the process would complete, but my installation remained at SP2.0. A dialog box prompt to inform one that the current installation must first be uninstalled would be of great benefit! Uninstall/reinstall is, of course, what I ended up having to do... 5. The "logging" capability of the Windows Installer should be OFF by default for speed reasons, as has been discovered and explained, but should be available as a toggled option for those users who may need or want to employ it. 6. I haven't tried the "new" SP2.1, but hope that the improvements is speed are easily noticed. 7. SolidWorks has stated that in the long term, the Windows installer is and will be a good thing for all. I have to wonder what is actually meant by"good". Per O. Hoel