Ok, so here's the deal. My mother has given me a Lenovo 3000 N100. When she gave it to me, it had a 70 gig hard drive in it. So I bought a 160 gig (actually a 140 gig, but as many of you know, a gig really isn't a gig. That's just dumb!) But I digress.. so, I bout a Apricorn Ez Upgrade Notebook Hard Drive Kit. I am running Windows XP Home. So, I cloned my hard drive onto the 160 gig and I put the original (70 gig) hard drive into the cloner. I was reading the Manual (which in all hine sight, I should have done BEFORE doing any of this) and it talks about making it into an external hard drive. In fact, it says this: "Using the EZ Upgrade as a external backup drive WARNING: Formatting a Hard Drive will erase everything on the drive! Please do not reformat the original drive until you have verified that your new drive is working properly. After successfully copying everything over to your new drive, the EZ Upgrade enclosure can be used as an external USB backup drive. At this point we recommend that you wait until you are certain that your new hard drive is working properly. When you are certain that your system is working properly, follow these basic steps listed below to use the EZ Upgrade as a backup drive. 1. Install the old hard drive into the EZ Upgrade universal. (Please refer to Page#6 for hard drive installation instructions.) 2. Connect the EZ Upgrade to your system. 3. Reformat the old hard drive. (See FAQ #4 on page 25 of this manual for a link to the Microsoft website with complete instructions for both XP and Vista.) 4. Follow the instruction in the appropriate section of this manual for Cloning or creating a backup image." So, when my mother did give me the laptop, she didn't have any disks for it. Not even the OS disk. I called here yesterday (I don't know much about computers... I guess you can say that i'm a beginner's expert? lol) and she said that she didn't know of any way. So, my question is, is there any way that I can reformat the hard drive without the OS CD?? Thank you so much for your help. Laterz.