Hi there. Today, when I turned on my computer it asked me to install something. I accidentally clicked "Never ask me about this again" option without reading it and then my computer is now all stretched out, like my clock on the vista sidebar is an oval instead of a normal circle. If anyone can help me with this it is greatly appreciated!

sounds like your screen resoloution had changed... no biggie

Right click your desktop select properties
under the settings tab change your resoloution (slider bar) to a suitable setting

System restore man..

takes your computer back in time baby <3