I have just attempted an upgrade from Vista Business to Windows 7 on my HP nx7400 laptop. I have win 7 but no access to any Microsoft programs. I have Office 2007. Thankfully, I backed up my .pst file beforehand.

I also have a desktop, running XP, and I have Office 2010 installed. My Outlook is fully functional but I haven't used it recently but it does have some years of mails etc in its pst.
Whilst working on a full OS reinstall for my laptop, I would like to add that office pst's contents to the existing mails etc that I have on my desktop.
Can that be done with a straight restore, or will I find that I have overwritten the existing data held within my desktop Outlook files?

Any help would be greatly appreciated
Many thanks

falcodriver