I have been using Ubuntu 10.04 since it was released. Over the last couple of days, I installed a number of applications recommended by different websites, and seem to have corrupted the system somehow.
Now, whenever, I boot into Ubuntu, the boot sequences proceeds normally until the desktop appears, after which the screen freezes and I am unable to click on anything (although the mouse cursor moves about all right). At this point, on the screen, I have the applet for my recently installed 'Gnome Do' application, and the dialogue box asking for the 'login keyring'. Since the latter used to appear earlier also, i presume that the problem might be related to Gnome Do.
However, since I am absolutely unable to do anything from this point on (can't click on menus, etc), I don't know how to uninstall Gnome Do. I inevitably have to press Ctrl-Alt-F1 to go to Terminal, and then do a sudo-reboot. Thankfully, I do have a dual-boot Windows XP on the same machine, from where I am posting this.
Can anyone help me get back into my Ubuntu? Right now, it has become completely unusable. Needless to say, I am quite a noob at this...