You can make it ignore Ubuntu and boot straight into Windows each time by doing the following in the terminal (Ubuntu).
- Boot up your machine and remember what slot Ubuntu is in and Windows is in in grub
sudo nano /etc/default/grub
- Use the arrow keys to navigate to
GRUB_TIMEOUT=10 and change it to
- Then change
GRUB_DEFAULT=0 and replace
0 with whatever slot Windows was in in grub, for example
- Go into terminal and type in
- Windows should now boot normally.
To manually remove the partitions, type in Disk Management in your Start Menu and open it up. Simply right click all the partitions that relate to Linux and choose Delete Volume, or whatever option is very similar to that.
Once your PC boots directly into Windows, and you've deleted your Linux partitions, you should be good!