TGDaily has compiled a report about feedbacks from users who have upgraded their operating system to Windows Vista.

Below are brief summaries for some of the feedbacks

Installation - users reported that their computer seems to hang during the process of installing Vista.
Video Card Issues - one person reported that he had to remove his external video card since he sees black screen after a minute into the installation.
RAM Issues - many users reported that using Vista on their computer which has a 2GB RAM and a Core2Extreme processor are having slowdown issues. One person reported that the Aero interface almost takes all of the 1 GB of RAM in his friend’s PC.