The HAL error is because you haven't installed your grafikcard so windows is using a defaultdriver. You need to download the drivers for your videocard.
I can't say what card you have, for that you have to read the productpaper that came with the computer or open the pc and check the card.
Most graficcards have either nVidia or ATI chips. Intel is the brand on your CPU (and some other stuff) but they dont do their own graficcards.
¤ Check the manual/documentary of the computer and look for the type of card you have for your grafics.
¤ If you can't find it in any documentation. Open the computercase and check the cards for any card with a logo from either nVidia
¤ When you find the correct card. Check for the name of the card. (could be ATI HD5670, or anything like that)
When you have all info on what card you have. Go to either nVIdia or ATI driverpage and select your card and download/install the driver.
Restart computer hand it should be fine.
Btw. at http://free.grisoft.com
you can download a free version of AVG Antivirus. So you don't need to worry about staying connected.
Cheers and hope this will help.