QuoteCould not start the service MySQL
that sounds like a classic problem of Vista thinking its smart by stopping programs.
simple way to fix this is log in as administrator.
deinstal and than reinstall
other way is:
deinstal MySQL.
now reinstal MySQL
when it asks to start setup a database press no (deselect it or whatever)
now go to the MySQL install path.
open the Bin map in the instal path and look for a exe called "MySQLInstanceConfig"
(for example C:\MySQL Server 5.1\bin\MySQLInstanceConfig.exe)
right click that file and execute as admin.
follow the database setup.
If that fails:
Remove windows vista
Install windows XP or windows 7
AND NEVER GO BACK TO VISTA AGAIN