I've opened a ticket to describe my problem but I thought I'd post to see if anyone else has had this, as I've not seen it listed anywhere
Basically after Installation, my Vista simply won't start up. It gets to the Welcome page and the blue circle thing just rotates forever rather than desktop appearing.
I've uninstalled, reinstalled, followed countless FAQs and posts on here and everytime I install the SQL stuff I get the same problem and have to system restore.