Colleagues, help, please, on the next question.
Got a netbook Acer Aspire One 531h, with the native WinXP. On hard there is a hidden recovery partition.
Put Kubuntu, respectively, by the boot loader was GRUB. But now there is a need to return everything as was, ie, Linux to carry, and the loader to return to their Acer'ovsky — to be able to ALT+F12 to boot to the recovery partition.
Before installing Kubuntu created a backup of the MBR with MBRWizard utilities.
So here's what you need to do to undo it?