|You *should* have a Dell Restore CD (or CDs) that can be used to restore the system to it's original condition...just as it was the day you bought it. However, the files needed to do this are on a hidden partition on the original HDD. If you swap drives, the Dell CDs become useless & a retail Windows CD will be needed. These clips are from the 5150 manual:|
"NOTICE: Using Dell PC Restore permanently deletes all data on the hard drive and removes any applications or drivers installed after you received your computer. If possible, back up the data before using PC Restore. Use PC Restore only if System Restore did not resolve your operating system problem."
"NOTICE: Removing Dell PC Restore from the hard drive permanently deletes the PC Restore utility from your computer. After you have removed Dell PC Restore, you will not be able to use it to restore your computer’s operating system."
If you want to use the Restore CDs, you'll have to come up with a way to transfer the Restore partition to the new HDDs, then use the CDs to restore the system.