I have Office Professional 2010 using windows XP Professional. My PC crashed and was wiped clean and then had everything reinstalled except Office. I purchased 2010 and installed. Set up new profile and got running but did not have any of my info. After this was done, I found a backup of my old 2007 .pst file. I managed to open and got all my old data, but now I have several .pst files. I would like to be able to only have one file containing all my data in one file.