error 1913 Mapisvc.inf missing

I bought a new laptop about 2 months ago which came pre-installed with Office 2007 Trail. Now as the trial period is over and I already have a Office 2003 full version CD, I thought to remove Trail 2007 and out Full 2003 edition. But when trying to install I get the following error message:

“Error 1913 Setup cannot update file C:\ Windows\ systems32\mapisvc.inf Verify that the file exists in your system and that you have sufficient permission to update it."

However I don’t know what does this file do, I checked the location provided above but there was no mapisvc.inf file. I don’t know how and why is it missing from there. I’m the only user on this computer and obviously the one and only Admin. Can anyone please tell me how can I get that file back and re-install my Office suite?

Thank you.

Well as far as i know you wont be able to create new MAPI or messaging profile in Outlook 2003 after you remove Outlook 2007 from the computer. You can read more about this in this KB Article http://support.microsoft.com/kb/926441/en-us

Thank you very much for the help friend, but unfortunately that dint worked for me. Can you be more specific and please let me know in simple steps what should I do now? I’m using Windows Vista computer.

Hello Turyan, I’ll suggest you to go through this Article http://support.microsoft.com/kb/923618/en-us. After reading this i came to know that your file is installed when you apply the Service Pack.