it could be a heat problem you did not mention if this is a desktop or laptop, if it is a desktop I would recommend turning it off disconnect all power from it, open the side of the case and look inside, if it has not been opened and cleaned in a long time my guess is it is full of dust bunnies, those dustbunnies can hold in the heat and heat will cause the pc to do what you are describing. To clean it out be sure you ground yourself by touching a metal portion of the back with one hand, you do not want to have any static charge happen that can damage things. You can use canned air to blow out a lot of the dust, do not use a big vacuum you can actually pull connections loose, I have a very small vac that I use on mine. to keep the fans from turning while you blow it out stick a pencil in to hold them in place.
especially clean around the power supply area and all the fans. Here are a few links that might help understand how to do this.
YOU can do this!
It could also be a powersupply going out, the heat issues will exacerbate that. Replacing a power supply is a very easy task and should not cost that much to have done if you do not want to do it your self. I would recommend going with one or two steps larger than the one that was in it.

The one thing I would like you to do, but I do not know what version of windows you have so I can not give your specific directions, is to go to the event viewer and look for red flags.
In control panel look for administrative tools, there look for event viewer, select that, there will be various options go through each one open them and look for any red or yellow flags especially red ones, any red ones you see double click right on that line and it will provide an info box with codes and errors messages write those down and post back with them. Look here go down to where it says instructions so you can see what the event viewer will look like
How To Use the Event Viewer Applet

How To Thoroughly Clean Your Dirty Desktop Computer

How to clean the dust out of your computer

Cleaning the Interior of your PC

Clean a Dusty PC

Let me know how things go after doing these things. And please give me some info on this pc, windows version, laptop or pc, a good way to find out everything you need to know is to run this free program it will give you all the info including how much RAM and how much hard drive space is left.
Belarc Advisor - Free Personal PC Audit
you will probably need some of that info should you need to replace parts so go ahead and make a copy of the results

I have and hpa6700f pc not a laptop. My friend who looked at it checked a lot of things out and couldnt find anything wrong. I am going to show this link to her and see what she says and I will get back to you. Where I said it was an electrical problem I think it was a power supply going out that they had said.

O and I forgot to tell you I have the vista program which my friend thinks might be part of my problem

no the fact that it is vista would make no difference, as long as you have gotten all your windows updates.

I would definitely go ahead and open the side of the case and see how much dust is in there, especially if it sits on the floor and it has not been cleaned recently, if it is 4-5 yrs old and has never been cleaned it DEFINITELY needs to be cleaned it is amazing how much dust accumulates.
That type of build up and the heat it causes makes things happen just as you have described and if it is not cleaned it will cause the pc to fail. Cleaning the inside of a pc is extremely important and it is something pretty much anyone can do with a can of compressed air.