Remember that Sage was always a bit slow in updating their SPMs to keep up with new technology. Product Update 18 came out at the end of March in 2010 and that was the patch that was supposed to make 4.30 compatible with Windows 7. Most of the issues that it fixed were related to printing and Paperless Office, I seem to recall (there was also a patch, LM-4046, which was required). Here is an SPM dated June 3, 2010 which mentions Windows 7. The funny thing is that this revision date is not accurate as this must have been modified after Windows XP support was retired since Sage removed any reference to XP from the document.