I am using a Dell 3000 Dimension computer. Originally, I was using the hard drive from a custom computer whose motherboard fried that had an installation of XP and SP3. With that version of XP, I was able to change the resolution on my monitor. After that hard drive crashed, I started using the factory HD and the XP installation disks that came with it. That installation only has SP2. I am unable to change the resolution on the HP L1506 monitor. I cannot access the internet through this computer. I installed a driver that I copied from my Windows 7 computer but the resolution still won't change. The video card was able to display the higher resolutions when I was using the original HD so that doesn't seem to be the problem. I was told installing SP3 will fix the resolution problem but I can't go to Microsoft and download SP3. Any ideas what the problem is and how to fix it?