dirtfarmer wrote: > i have a problem my compter reboot one me with out warning, i > have a hard time some time geting window to start up, it come up > with error and i try last know good seting, and that most time > work after 1 or 3 time, i also get the compter to reboot some time > when i plug in a USB, or play a cd in my rw cd rom or play a dvd > in my dvd cd rom > > this problem is really start to bug the day light out me, as it > happen so fast or not at all > > i been told to change the power supply The usual culprits are: - Bad power coming into the computer. i.e. brown-out situations or incorrect voltages coming in from outside (I've seen 130VAC on what is supposed to be a 120VAC outlet). The solution for this is typically a power-conditioning UPS that will adjust the voltage to compensate for over/under voltage conditions. Note: Poor power quality from the power company can cause marginal PSUs to fail where they would work fine in a cleaner power environment. - Overworked power-supply. Typically only happens if you add additional equipment to an existing case. But could also happen if the power-supply was marginal to begin with (barely able to power the original equipment) and has now begun to fade. A larger and/or better quality PSU will help with this. You can attempt to troubleshoot by diconnecting non-essential equipment (CD/DVD, floppy, secondary hard drives, tape drives) and seeing if the PC is stable. If it's stable with less of a load, then you probably want a new PSU. - CMOS/BIOS battery is dying can cause odd issues sometimes. This doesn't sound like one of those. - Heat. Is your CPU overheating and the thermal protection circuit is shutting the system down to save the CPU from damage? Grab a copy of SpeedFan 4.28 from http://www.almico.com/speedfan.php and look at your CPU temperature. Or some BIOS's have a screen where you can view the PC Health including CPU temperature. The NOSPIN Group Promotions is now offering our special coffee mugs and mouse pads with the PCBUILD logo... at a great price!!! http://freepctech.com/goodies/promotions.shtml