After the Creators update of Win 10 a merge mail that used to work fine, now takes an hour or more to perform. I'm using MS Office Small Business 2007 with Business Contact Manager. I have seen the same slow-down on both a 32 bit and 64 bit version of Windows 10 version 1703. In Word 2007 I have the merge document with Outlook 2007 Contacts as the data file with >1000 Contacts in the .PST file. It used to take about 10 seconds to perform the merge in Win 10 version 1607, but now takes >60 minutes. What is slowing down the merge process in version 1703?