There was a need to use one PC with Ubuntu and Win10.
Never in detail did not penetrate, but to the 10s when installing Ubuntu there was an option to set next, now it is not. Found some instructions to resolve this issue. In the simplest version had to cut off the space from the D drive and when you install Ubuntu choose the "Other option", format cut the disk in ext4 / - after installing the Ubuntu boot option not there. Found another version where it was necessary to cut a section bootgrub(or something like that), which is installed on the loader, the result is similar to the first.
What are you doing wrong? How to install Win10 and Ubuntu on a single PC?
Help to solve the issue, the virtual machine lag is terrible.
The virtual reality and everything else is inconvenient: you'll have to constantly be reset, and the high risk to break the system.
So the dev does not lag, you need to install add-ons for the guest OS, and then it performance will run with the speed of the host OS.
In addition, it will review the question of how you use the OS. For example, for a web developer does not need Linux for development, it is needed only as a runtime, so there will be enough versions of Linux without GUI, transparently running via vagrant. No GUI, and therefore deserve nothing.