This question is in the category Powerboats - Desktop computers will be best
You do not say the make & model (not too important)
You do not say the Operating System (somewhat important)
You do not say what "too long" means - does it never boot up or does it just take a long time - how long?
Perhaps a new question will get a more sensible answer.
Good luck...
Peccavi, June 2010
