Kubuntu 12.04.02 Virtualbox 4.2 x64 | ubuntu ppa does the same
Problem: Windows XP 32bit guest extremely slow HDD IO appears to be on full load
Virtualbox spec: display ram 128mb 2d enabled IDE 32 bit Guest additions installed changed and checked I/O cache settings
When running virtualbox from terminal it says "E*rror opening file for reading: Permission denied*" This seems to be related to kde cache
Should not be a PC /hardware issue, checked different HDD with same result. CPU is intel i5 2500K slightly overclocked. Z68 mainboard chip (checked sata 2&3 ports)