Thank you for the Link Dave, I had the laptop apart last week (that was fun!!) and cleaned the fan there wasn't a lot of dust in there tho which surprised me. I am gona have to ask the COMPANY who re-installed for a disc.
thanks for all your work on this matter.Hi Dave I have been TRYING to reinstall windows but it gets to the point of formatting the hard drive and shuts down?? also the disc I have is not suitable for the sfc /scannow as it says it is a different disc. am at a loss here as to what to do?
It WOULD appear that there could be something defective with your harddrive or some other some other component of your COMPUTER. Please try running a diagnostic on your harddrive.

Run hard drive diagnostics: tacktech.com
Make sure, you select tool, which is appropriate for the brand of your hard drive.
Depending on the program, it'll create bootable floppy, or bootable CD.
If downloaded file is of .iso type, use ImgBurn: imgburn to burn .iso file to a CD (select "Write image file to disc" option), and make the CD bootable.
For TOSHIBA hard drives, see here:

Note : If you do not know how to set your computer to boot from CD follow the steps here