Tom wanted to learn Linux, so he loaded up Linux on his PC. After a month, Windows now wants to install a feature update 1903 and now he's lost a partition. Leo says that Windows is being "bossy," thinking that it's the only OS you should have. So it "clobbers" your boot record and causes a boot-up issue. It's a common, yet complicated issue. You need to have a boot manager to sort it all out. Leo recommends GRUB. It gets loaded first and then asks you which OS you want to use. Most likely, the update redid the master boot record, damaging it.
Caller wants to dual boot into Windows with Boot Camp, but it's telling him that he doesn't have an Intel processor, so it won't work. He bought a used Mac, what gives? Leo says it may be that Mac doesn't have the most recent version of the OS (it's running El Capitan). Leo says to do a clean install of MACOS and do an immediately BootCamp installation. See if that works.
Rick upgraded Windows 10 on a secondary drive, keeping Windows 7 on his C drive. Now he has a dual boot option. However, with Windows 7 support going away, how can he make sure he's OK if he has to replace that secondary drive? Leo says it'll authenticate automatically because Microsoft gives an entitlement based on the entire machine, not a hard drive. If he had to replace the motherboard, video card and hard drive, then he'd have an issue. But changing a hard drive won't cause the problems.
Ray wants to know if you can dual boot a Windows machine with Apple OS X. Leo says no. You can go the other way around and boot up to Windows 10 using boot camp, but you can't make a Windows machine run OS X unless you do a "hackintosh" setup, which is a direct violation of Apple's terms of service. Plus, Apple won't sell you a copy of OS X without a computer.
Charles would like to create a dual boot system on his laptop with Windows and Ubuntu Linux. How can he do that? Leo says that running Linux on his computer is a great journey and it has become a lot easier to create a dual boot system with Ubuntu. All he needs to do is download the installer to a USB key and then boot to it. Then it will walk him through creating the dual boot portion. Then when he boots up every day, the GRUB boot manager will ask him which OS he wants to load.
Bruce does both Mac and PC work, and he's looking for a laptop that can handle both well. Should he buy a PC centric computer that can run a Mac virtually? Or the other way around? Leo says that there is no way to run macOS on anything but a Mac, especially not virtually. He could do a hackintosh, but not on a laptop. So Leo says go the other way, and get a MacBook Pro running Windows in Boot Camp.
John has an old PC that runs XP and he's going to install Debian Linux on it. He wants to keep XP on it to run dual boot, though. Can he still get Service Pack 3 to get it up to date? Leo says that Microsoft has killed XP development, so he can't really get ahold of it except through a third party archival service. He'll have to decide if that's legit. If he installs Linux first, it may prevent installing Windows XP in the process.
Charles bought a new computer and is trying to back up his operating system before he gets going. Leo says it's a good idea to make an image right at the beginning. He can even do it on a small 8GB USB thumb drive and keep it in his pocket. The laptop will likely have a rescue utility that will enable him to create a restore rescue disc, but he can also use the Windows 10 backup feature. Just press Windows Key and type "Backup" and then go to backup settings. Then click "Backup and Restore (Windows 7)." This is actually an image backup, and it will create a system image.
Tony has a Windows 7 laptop and he wants to replace the hard drive with an SSD and then dual boot with Windows 10. Leo says it's completely doable. Leo recommends backing up his data and then replacing the drive. Then he can do a clean install of Windows 7, and then do the Windows 10 upgrade. Then he can also choose a dual boot option.
There are a few pitfalls doing this, though. Leo recommends Googling "Windows 10 dual boot" for tips.
Glen wants to dual boot with Windows 7 and 10. Leo says it can be done. He can do the download and it should ask him if he wants to install Windows side by side. Will he be able to update both? Leo says absolutely. It'll be free, too, since the license is associated with the hardware and not the user. He'll have to update within the version he's using, though.
Glen should create his partition first. Then go into the Windows installer and choose the dual boot side by side option.