Hello, Having followed the tutorial at http://www.howtoforge.com/running-ubuntu-on-windows-xp-with-portable-ubuntu I wanted to instal portable ubuntu to the Desktop of my Win XP. However, when I opened the file run_portable_ubuntu.bat as instructed, the green arrow appeared at the sys tray for an instant and then it disappeared very quickly. What's more, I can't see the Ubuntu taskbar which should have appeared at the top of my desktop. After I ran the file for the second time, I clicked the green arrow before it desappeared again, but it didn't help. As for firewalls, I use Spybot, whose resident protection mode I have disabled before the instalation. I downloaded the instalation file from sourceforge.net to D:\. Thank you very much for your help.