I had big problems with my OS on my tiny Acer Aspire one 150 and it seems at last I deleted "everything" from it. I tried to install XP SP3 OS on it using a USB CD-ROM but on the very beginning in setup, it says: "please insert a disk labeled Windows XP SP3 CD into drive A and press Enter when you are ready". I could do nothing but installing a Mandriva Linux on it for now. but how can I solve the problem with installing XP? Please help.
As you rightly said, you have deleted the folders containing file systems. I advise you to boot from an original windows cd to reinstall Windows.
However you'll see your linux partition disappeared beacause once you install Windows after a linux installation, you will overwrite the grub which allow you to boot Mandriva. I suggest you partition your disk, install Windows first then Mandriva and therefore you will have the dual boot that will allow you to boot either Windows or Mandriva.