Thread: Computer won't boot post-Ubuntu installation, MBR problems?

hey guys, badly in need of here. i've sort of worked out problem after late night of screwing around (kind of linux noob here) lacking knowledge on how fix it. so, short of it:

tried install ubuntu dual-boot on windows xp machine, using usb stick trial os , automatic installation. screw-up came when left external usb hard drive plugged in during install, , far can tell, ubuntu installed on opposed internal hd. when try boot, knocked straight grub rescue prompt error message shows "no such device (my external's id)" -- assuming mbr (which know nothing editing) trying boot off external isn't enabled until os starts up, , dumping me @ rescue prompt when can't find it.

can still load trial ubuntu off original usb stick (though can't online without wireless drivers), that's functional computer gets right now. , don't have windows setup cd anywhere (using rooommate's mac @ moment terrible european keyboard on it). there way edit mbr or tell boot regular xp off internal hd, @ point can re-partrition , try whole thing again, or otherwise remove failed install of ubuntu through trial-stick or... well, i'll leave suggestions all. i've been working on since 4am last night , brain kind of fried.

in advance help, stuck in real bind here, hoping fixed before roommate gets work , needs laptop back! obliged, guys.

can boot external plugged in?
there should grub option boot windows.

copy of xp install disk, start emergency repair console , type "fixmbr".

xp install disk should work.

otherwise have used application named "ms-sys", (google it, may hard find).
restore xp mbr if booting ubuntu live cd.

emergency repair console simplest , safest.

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