The short answer is "I don't know".
You have to decide if there is any harm in trying. I don't *think* (but also don't know if) a restore touches the BIOS so essentially all you *might* do is install a broken Windows on a partition of your hard drive that you can just reformat when it doesn't work. The second issue would be if the restore installed a bunch of incorrect drivers what would happen? Would they just not work or would they damage the hardware? Finally would Windows register properly? Dell copies of Windows don't need registering with Microsoft if they're installed on Dell machines, but they still might get picked up at some point if you were running the same windows as a friend.
I'm afraid I can't answer any of those questions, maybe someone else can shed some light.
BUT I have a Dell Dimension 2150 and it DOES have a restore option somewhere during startup, so I assume your computer will also. I can't remember quite how to get to it, but I think its either press F8 or press Delete during startup, then look for a system recovery option or something similar.
If all else fails don't you have a Windows CD that came with the machine? Problems to watch out for with that is finding all the right drivers (most of which you can get from the Dell support page by putting your service tag in, but a better idea would be to backup your drivers folder before you format the windows partition then search for drivers in that when you're adding them later) and losing DVD playback when you don't get a DVD codec installed. Unfortunately I'm going to have to do a restore on my computer shortly after I did a reinstal for exactly these two reasons.
Edit: Here's a link with some more information. It suggests the restore hotkey is Ctrl+F11
Edit 2: Ah no, my PC isn't actually that old. Its a 9150
You have to decide if there is any harm in trying. I don't *think* (but also don't know if) a restore touches the BIOS so essentially all you *might* do is install a broken Windows on a partition of your hard drive that you can just reformat when it doesn't work. The second issue would be if the restore installed a bunch of incorrect drivers what would happen? Would they just not work or would they damage the hardware? Finally would Windows register properly? Dell copies of Windows don't need registering with Microsoft if they're installed on Dell machines, but they still might get picked up at some point if you were running the same windows as a friend.
I'm afraid I can't answer any of those questions, maybe someone else can shed some light.
BUT I have a Dell Dimension 2150 and it DOES have a restore option somewhere during startup, so I assume your computer will also. I can't remember quite how to get to it, but I think its either press F8 or press Delete during startup, then look for a system recovery option or something similar.
If all else fails don't you have a Windows CD that came with the machine? Problems to watch out for with that is finding all the right drivers (most of which you can get from the Dell support page by putting your service tag in, but a better idea would be to backup your drivers folder before you format the windows partition then search for drivers in that when you're adding them later) and losing DVD playback when you don't get a DVD codec installed. Unfortunately I'm going to have to do a restore on my computer shortly after I did a reinstal for exactly these two reasons.
Edit: Here's a link with some more information. It suggests the restore hotkey is Ctrl+F11
Edit 2: Ah no, my PC isn't actually that old. Its a 9150