Dell DimE310 wont reeboot

try this unplug your machine,take off the side cover,there is a jumper near the battery for the cmos,it has three pins,remove from pin 1&2
and place on 2&3,remove an return to the original position.
plug in and restart,at startup press F2,scroll to boot sequence and press enter,change order to (1)CD,(2) IDE hard drive(3) SATA hard drive,save and exit.

You should be able to get a start up software that is a portable software that can reside on a usb stick. Hunt for this software using google. Call out for a portable xp or what ever OS system ... and you can use this as a startup. When it does start up go to safe mode and resolve the hard drive errors with trojan virues or defrag, then use error professional pro to clear out dll and other problems. Most times all the problems are found it the unused program paths and other internet cookies and affliates thet go along with the rest of the errors. You can also get Regcure, this is also a good system problem solver. This softwae really works.