Windows xp sp2

From: aileen (anonymous_at_discussions.microsoft.com)
Date: 08/31/04 

Date: Tue, 31 Aug 2004 03:53:48 -0700

I set this to install last night and it told me how long
it would take, etc. However, this morning there was a
message saying it "could not be installed". NO REASON
given. How can I find out why it couldn't be installed.