It is not possible to answer that without some information. For all I know the computer could be turned off.
Seriously, if you tell us something about it we can probably help.
Perhaps you could start by telling us what processor you have and how much RAM. Those would probably be the most limiting factors which could make a veeeeery slow installation. If those are relatively up to date, then it could be faulty hardware, or more likely, bad installation media.
What (if anything) was the computer running before - did that work OK?
How are you trying to install?
What have you tried so far?