If the computer seems really choppy to work on...it may be a video driver issue after reformatting too...
Do this for us:
Right-click on My Computer, then left-click on Manage.
You should see a window that is called Computer Management. Left click on Device Manager.
You should see a window that shows something like this:
If you see any yellow exclamation marks ! that is telling you what is wrong or missing from your computer. Let us know what you see. Red x's are bad...so hopefully you do not see any of those.
If it looks clean, like mine, we will know that all of your computer drivers are installed correctly. then we can proceed to dig deeper.
shawno 8)