If you have been trying to resolve a Windows Error code 1612 you are in luck. Our how-to guide will walk you through the steps needed to clean up the Update problem (The installation source for this product is not available. Verify that the source exists and that you can access it.) from your PC.
When trying to install or remove Microsoft Office XP SP-1, this error may occur. The issue is caused if there is one or more stand-alone versions of a Microsoft Office XP program, such as Microsoft FrontPage 2002, Microsoft Publisher 2002, or Microsoft Access 2002 installed on your computer.
These are the steps recommended for solving Windows code 1612
To resolve this issue, use the Microsoft Windows Installer CleanUp Utility to remove the stand-alone programs. To do this, snstall the Windows CleanUp Utility. More information about this Utility at this web address: http://support.microsoft.com/kb/290301 To remove the stand alone programs, click Start, point to Programs, and then click Windows Install CleanUp. On the list of installed programs, click each Microsoft Office program, and then click Remove. Follow the instructions that appear on the screen to complete the removal process. When the removal process is completed, click Exit. Note You can reinstall the stand-alone programs after you successfully install Office XP Service Pack 1
TipFor further information please read: How to fix Windows error #0x10010000