voltage problems

i just built my sister a computer this weekend, duron 900, msi nforce mobo, 256 meg crucial ddr. the problem im having with it is the power read out for 3.3 volt reads 4 volts, is this a seriouse problem? its a pretty generic power supply. all the other volatages are good though.

i went to the tomshardware forums and all i got was this lousy signature.

that power supply has been used in 2 other computers now, they all are fine, i will probly replace that psu as soon as payday comes. is it wise to leave the computer off till i can replace it or would the damage already be done, if there was going to be any. i notice in msi's system checker thing, the 4 volts is just barely in the red zone.

i went to the tomshardware forums and all i got was this lousy signature.