I have an xlsx-file of size 27.3MB and when I try to open it either in Libreoffice or Matlab the whole system slows down My processor is AMD Sempron(tm) 140 Processor (should be about 2.7Ghz) Memory I have about 1.7GB Any ideas? I opened this file in Windows no problem...of course it took a few seconds to load but Ubuntu freezes with this file completely...smaller files of size 3MB, 5MB etc open just fine... thnx for support =)