*---> Please ensure the following prerequisites are in place on the system before installing the Vista SP1
· Through windows update install the update 935509 for Vista Enterprise and Vista Ultimate only
· Install updates 938371 and 937287 for all the versions including enterprise and ultimate
· Check for windows updates and click on view updates to view the list of updates available. Check (a) all the optional updates and install them
· The optional updates contain device drivers for Audio, modem, graphics, wireless card, NIC etc..
· Installing SP1 without the device driver update may cause some of the devices to malfunction.
Please Note: Driver update from dell.com may not help as the driver versions could be older than the ones required for SP1 update
Below is what MS says...
*---> If u get this Error message when you try to install Windows Vista Service Pack 1: "Installation was not successful" or "An internal error occurred while installing the service pack"
http://support.microsoft.com/kb/947366
and also....
Issues occurring during the installation of Vista SP1:
· Error 0x080070002 – Current fix is to run CheckSUR, and then retry the update to Vista SP1.
· Error 0x80073712 – Current fix is to try CheckSUR
http://support.microsoft.com/kb/947821/en-us
@@@@@@@@@Basically, look for the 3 pre-requisites@@@@@@@@@@@
and also, being a technician, I would advice not to install SP1 by downloading it directly from microsoft.com (also called standsalone installer)