I have recently installed Lion, which has caused me tons of problems. Apple support helped me to back up my entire hard drive to my Time Machine and then restore. I now have a new problem in that I can't open historical Excel Files (I have Office for Mac), new files are fine. When I try and open one I get the error message "The file may be read-only or you may be trying to access a read only location. Or the server the document is stored on may not be responding" I'm not sure whether this is because of Lion or because the files were backed up and moved. Anyone got any ideas?