woohoo a Linux problem… the first I have seen in this forum 🙂I'm only a novice Linux user myself, but its great fun and I do like a challenge. As it happens, I think I can tell you exactly what the problem is, Rob.When you install a Linux distribution as a dual boot, it needs to interfere with the way Windows loads, or you wont have a dual boot.. Windows will just load. This is because the hard disc has whats called a Master Boot Record, or MBR. When you start your computer, the first thing that loads is the BIOS, which is a program that is hardwired into your motherboard. Thats all the 'spiel' you see running down your screen when the computer starts. The BIOS searches for the MBR, which contains instructions to tell the BIOS where to start looking for operating systems. In a Windows-only computer the MBR will tell the BIOS to load Windows. The Linux distribution you have had installed, Ubuntu, has had to modify the MBR to allow you the choices of more than one operating system, and since it cant change Windows itself, it modifies the MBR to make Linux load instead of Windows. The options you then see which ask you what you want to boot into are actually a small program called GRUB (part of Linux), which then takes control and allows you to boot into either operating system.Your brother has no doubt uninstalled Linux, but forgotten to restore the MBR back to its original state, so the BIOS cannot find Linux now that its gone, and cant see Windows in the MBR. It thinks there is no operating system as a result of this.Since you have said you have an XP disc, the solution is actually pretty easy. Stick the Windows disc into the computer, and boot the computer. Let the disc go through all the stuff that it does, and when it gets to the option.. what do you want to do.. install windows XP.. repair an existing windows installation using recovery console.. etc.. choose the recovery console option.Once you've done that, it will search for a bit, then come up with a list of operating systems. I am confident your Windows installation will still be there!Select that, and you'll get a command prompt... a bunch of writing and a flashing cursor. Type in where the flashing cursor is.. exactly as followsfixmbrthen hit enter. It should only take a few seconds, and then the flashing cursor will reappear.Shut down the computer. removing the XP disc while its shutting down. Restart the computer, and I am willing to bet Windows loads!
Mitz from Tips4pc