I have been trying to install the following updates for quite some time now\nand repeatedly get error code 646. The shutdown button in the start menu\nalways has the icon for install updates then shutdown. I have the computer\ninstall and shutdown, then the same updates show available and the icon is\nstill there even after I have restarted the computer.\n\nSecurity Update for Microsoft Office Excel 2007 (KB973593) â€“ 11/10/2009\nSecurity Update for Microsoft Office Visio Viewer 2007 (KB973709) â€“ 10/13/2009\nSecurity Update for the 2007 Microsoft Office System (KB972581) â€“ 10/13/2009\nSecurity Update for the 2007 Microsoft Office System (KB973704) â€“ 11/10/2009\nUpdate for Microsoft Office InfoPath 2007 (KB976416) â€“ 12/85/2009\nUpdate for Microsoft Office Outlook 2007 Junk Email Filter (KB977719) -\n2/9/2010\nUpdate for Microsoft Office Word 2007 (KB974561) â€“ 1/12/2010\n\nI am running 32-bit Vista Home Premium with SP2. I am using Office 2007\nwith SP2.\n\nI have done the following from guidance in this forum with no luck. Control\nPanel > Administrative Tools > Service and configured Office Source Engine to\nautomatic. I tried windows update again, no luck.\n\nDoes anyone have any ideas for solutions? Let me know if you need any for\ninformation or clarification.\n\nMuch thanks.