Windows vista

Hello,
i have laptop ( toshiba satellite pro ) i install window vista. but after 1 month i install updates during installion computer show masage " Updates were not configured correctly. Reverting changes.Do not turn off your computer." after computer going to shutdown and star automaticaly and show again this masage and than again shuting down. continously system doing that. so pleaze tell me wht i have to do come out from this problem.
Hope of best regards.
anjum