I've searched all over for the answer to this but, unbelievably to me!, I'm not finding the answer. Here's the situation: 1. New HP PC with OEM version of Windows XP. 500 GB HDD. 2. I have the cd that was included, that has Win XP Svc Pak 2. I also have the HP "Restore Plus" cd that I had to insert when I first booted in order to activate XP. 3. I also have (using fabulous Macrium Reflect) an entire image of the hard drive (one partition, C ) that I made before I did anything else. 4. I can't have everything on one big monster partition. So, with backups and image (see above), I re-inserted the XP cd to reload the OS, and used this to re-partition the hdd into 3 partitions (C, Data, Other) and I re-installed XP on the C partition (which is about 50 GB in size; I have found this works well for OS and programs.) PROBLEM: I can't activate (or re-activate, actually) XP. I got the screen that tells you to activate by phone and I keyed in the 9 groups of numbers but it would not activate. SO, I called the MS number, talked to someone with a strong Indian accent and had to practically scream into the phone for him to hear me, he takes me through the same process (duh) and of course it doesn't work. I tried to explain my situation but he just gave me MS tech support number and said to call M-F 8 a.m. to 6 pm. or something like that. Well, it's Saturday, and I don't want to wait til Monday only to not get an answer. Ideas? Oh, and BTW, I also had the foresight to run the belarc (free) program that gives you all your system info, including the license key. (I knew I'd need to key this in on the re-install.) BUT this is what didn't work, above. I am figuring that by re-partitioning the disk, that XP has decided that it is a different PC and thus will not let me activate with my OEM version. Can I just complain here a second and say, in this age of large disk drives, why on earth doesn't MS and these vendors get together and figure out a way to let us partition our hdd's and then install an OEM version. Also, I did try to restore my original C image to the newly-partitioned C drive (new drive being much smaller, of course) but the Macrium restore software won't put it on...natch, it is looking for the original entire-disk-hdd. Is there a way to get XP re-activated on a new partition (of same HDD and same MOBO it was originally installed on)? Or should I wait til Monday and see if MS tech will help. Or should I just throw up my hands and load XP again, but re-partition BACK to the original one partition? (and then will I be able to activate XP). This is really frustrating because all I'm trying to do is to customize my new PC in a way that makes sense when you have a 500 GB HDD! THANKS for the help.