Whats the name brand? or provide a link.
Either the psu is putting out these low voltages or the readout is wrong by the software but I doubt that because of the troubles you are having.
Here is a link to help you understand the impotance of a quality psu
http://www.techsupportforum.com/showthread.php?t=107466
If you are using generic psu's they can produce low voltages, cause problems like this and overall be unreliable