Why does my computer freeze on start up.?

On start up, the various security screens apear then move on,

and the icon's build up at the bottom of the screen to about half the number that there should be,and the screen, and mouse arrow freeze up. I then have to reboot it,and even then that some times fails. Any help would be greatley appreciated

Why does my computer freeze on start up.?moto guzzi

Try booting up in safe mode, then doing a full virus scan/removal. Also, you might want to get rid of some of those un-used/un-needed shortcuts, and startup programs/services. Also, do what the guy after me suggested (but do it first). I recommend dusting your computer out on a regular basis, and I recommend that to everyone reading this. I've actually dusted out computers that wouldn't boot up, at all, and after doing so, they worked.

Also, you didn't mention whether, or not, you had just installed any programs, or drivers...... If you did, then do what Basscleff suggested (before anything).

Why does my computer freeze on start up.?norton internet security 2008

Might need defragmented.
Have you tried cleaning out your computer? Dust in bad places might cause it to overheat or just not complete a good circut which would in turn mess it up....
video drivers, or something you recently installed is causing a problem

boot safe mode uninstall the most recent programs, or try a system restore.

uninstall video card drivers if you changed them recently.
because its a PC, buy a Mac!