Dell Latitude D610 stuck on XP bootup

My cousin got an old laptop that had a virus on it. I reloaded XP on it and just got all the main drivers in, Wireless network, wired, bluetooth, and audio. It all was working fine. I downloaded Itunes then an audio driver from the Dell site, and it worked. But i shut the computer and came back 5 mins later and it was all black for at least 5 mins. It was weird because I could still do stuff. For example, I could press space and make Itunes start playing again because it was still pulled up. No biggy I thought so i held the power button down and restarted. Now it takes a VERY long time to get past the XP boot up. I can go into BIOS and safe mode just fine. (Although it did a weird thing when I clicked safe mode. It had a a list of the same thing dealing with the hard drive over and over with some word change at the end. after about two mins it went into safe mode though).  Before when it had the virus it took a long time to boot up but not when i re-did it. It DOES boot, but slowly. is their any way to fix that?

thanks,

Mitchell