First of all,how did you Fdisk using XP? You must have used an old floppy with Fdisk , the MSDOS. Did you know XP will do a fresh install on it's own? It's NTFS not FAT so DOS doesn't work very well with it. This is a simple description but it's to the point. Either way, now you have to go through these steps if I can remember off hand exactly how it goes...
Go back into Fdisk, yes for large support, delete any partitions completely, you may have to delete the non-fat partitions if residule ntfs is on it. Make sure all primary partitions are gone. Now, restart, go back into Fdisk, large support yes, create a primary partition using full space. Once created, exit out, restart, with floppy still in, don't go to FDISK go to command prompt,the A: and type this... format C: <notice the space between format and the C: and then hit enter, you should then be taken through the two processes, one verifying, one formatting. Once formatted, restart but "without" the floppy. Make sure you hit "Del" key to enter Cmos setup and set the pc to boot from CD, set all to boot from CD if need be, won't hurt anything. Then save , usually by hitting F10 and exit out. Make sure your XP CD is in the drive when you restart and you should be shown a text saying hit any key to boot from CD and when you get to installing Windows, make sure you delete the partition and format in NTFS format, it will take you through the steps. I have run into your situation too often where MSDOS FDISK is used to get rid of XP, a mess for sure. If it won't work , post back or if you get confused.
please help me i had windows XP on my computer and i encountered a problem so i F-disk my computer. I know wrong thing to do but I was at my the end of my rope. now iam trying to reinstall xp on it and an error message saying missing NTDLR file. i dont know what to do it wont let me install windows 98 or 2000 nothing. can someone walk me through the steps on fixing my computer its been almost 2 months since my computer worked. please fhelp anyone