Win 7 Pro 64-bit.\n\nInstall Office Pro 2003. Try to open a .DOCX file - fails (obviously).\nDownload and install the "Office 2007 Compatibility Pack" (i.e.\nFileFormatConvertors.exe).\n\n..DOCX files now open OK\n\nHowever when I try to open a .XLSX file, it opens read only, with a\nnumeric incrementing reference number. If I try to save it the dialog\nstarts in a temp folder and there is no option to save as type .XLSX -\nthe default is .XLS.\n\nFiles of type .XLS open OK\n\nI check the file association: the default is "Open XML Convertor".\nChange this to "Excel" - now it doesn't recognise the file format!\n\nSecond PC - exactly similar specification\n-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\n\nInstall Office Pro 2003. DO NOT try to open a .DOCX file! Immediately\ndownload and install the "Office 2007 Compatibility Pack"\n\nOn this machine I can open .XLSX files OK!\n\nHow can I get the first PC to behave correctly, please?