This has happened on some of my machines and i cant dig up a solution.. This effects Office 2002 and 2003 with 2007 Compatibility Pack non-sp1 and sp1. Opening native files i have no issues, but when trying to open an .xlsx file i always get " Not enough memory to run Microsoft Office Excel. Please Close other applications and try again." followed by "file conversion failed" machines are XP SP3 and have PLENTY of ram. any input would be greatly appreciated.