In a Multiboot system, I have often found it better to install windows first and then ubuntu. This way all the boot menu options show up in ubuntu. This has often give me the easiest time to configure. If you are doing a multiboot with just windows start with oldest operating system and work your way to the newest. Now back to windows and ubuntu. If there is an issue with ubuntu where you decided to install windows second. Nine times out of ten, it will rewrite the boot sector and only boot straight into windows and not even leave an entry for the ubuntu operating system.

If this occurs, everyone will tell you to
1. run your ubuntu livecd
2. install boot-repair from livecd
3. run boot-repair by selecting recommended repair
4. you are done

for step 2. you need to go into terminal and run
sudo add-apt-repository ppa:yannubuntu/boot-repair
sudo apt-get update
sudo apt-get install -y boot-repair && boot-repair

Now what happens if your livecd version is old…
Step 2 will probably not work for you… if thats the case then you have two options…
the simpler is to just download and burn to usb or disc the boot-repair iso and then boot to it. If your system does not allow booting from usb but you want to boot from usb then burn plop to a disc boot to the disc and then use plop to boot the usb.

Another possibility is to use plop to boot directly into the partition where ubuntu is… launch it and from there run the three lines and then do the repair. That was a recent thought but its worth trying…

In any case, back to my discussion, use plop to boot into thumb or run iso… and then your repair should be done… If you try to just reinstall ubuntu… heck who wouldn’t you are liable to end up with a fully installed ubuntu that is still not accessible because the boot entries weren’t fixed…

Yep I did that one too…
and if you are thinking about easybcd and virtualbcd… those only work if the boot entry is fixed. Meaning you will end up just chasing your tail.
Yep I did that one too…

Now lets say you want to get rid of the ubuntu bootloader grub2 and use windows bootloader… just follow the bouncing ball at the easybcd tutorial below but remember for xp and older your mileage will vary…

if there is an issue at this point remember you can still load your ubuntu through plop or repair it with boot-repair…

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