Log-In Hangs

[mikeody]

Have just installed current Ubuntu desktop version [8.04]. Only OS running on my PC is Ubuntu.
Install went perfectly as did update download and install.
However after login and password accepted OK, screen flickers a few times then hangs with blank screen.
If however I 'interrupt' login process with Esc, then choose option 1 [which I guess is the default login anyway], Ubuntu then logs me in OK.
Not a big deal as I can 'interrupt' the process each time I log in but is there a quick fix that anybody knows ?
As I am a newbie to Ubuntu any advice would be best in single syllables !!
Thanks.

[mikeody]

All now fixed.
Edited Boot Loader to change delay time before default loaded from 3 secs to 10 secs.
No problems now.
I assume 3 secs was just too quick !