I'm still recommending that Windows 7 users running a business or concerned about the privacy of their files should not upgrade to Windows 10 at all. Windows 8 and 8.1 users should consider upgrading to Windows 10. Upgrades of operating systems come with issues of network and printer compatibility. It's always better to do your homework first.
Ubuntu 14.04 Desktop LTS is a solid replacement for previous Ubuntu desktop versions and for those migrating away from Windows XP or Vista. Ubuntu 16.04 Desktop LTS is the next version and it is available now for 32-bit and 64-bit computess.
Be sure that you regularly backup your important files and photos to a memory key or external hard drive that you later unplug from your computer. Ransomware can encrypt your files and hold you hostage until you pay $$$.