I have set up windows xp on virtual box on my laptop which is running Ubuntu 12.10. Now, I am trying to install guest additions on the vm. But, whenever I click it, it doesn't open the oracle window. Nothing comes up actually. I tried doing this in safe mode, but it still doesn't work. Someone please help.
I recently tried this too, had the same problem and was looking for an answer and came across this. Found the solution randomly myself. When i opened Windows Explorer/My Computer I saw "VirtualBox Guest Additions" as a Disc in the drive. I guess auto play for disc's isn't enabled for WinXP x64. Double clicking it ran the installation