Windows 8 or later has the built-in feature to open / mount ISO files. However, creating an ISO file requires other tools. There are many free utilities available.
Today, I tried ISO Recorder v.3.1.3 64-bit. The last update on its web support says it supports Windows Vista and 7. In my test, it works in Windows 10 as well.
Create an ISO file
There is no icon or shortcut to launch ISO Recorder after the installation. To create an ISO file, right-click on the CD / DVD drive, and select “Create image from CD/DVD”.
Mount an ISO file
Before installing ISO Recorder, Windows 10 will automatically mount the ISO to a virtual CD when double-clicking an ISO file. After installing ISO Recorder, double clicking an ISO file will launch ISO Recorder to write the image to a CD.
To mount the ISO file, right-click on the ISO file, and select “Open with” and “Windows Explorer”.
PS. I almost forget another free tool - ImgBurn. This was my go-to CD ISO creation and writing tool. The current version is v.2.5.8.0 released on June 16, 2013. This may still work in Windows 10, but I have not tried it yet.
Other free CD tools: MagicISO Virutal CD, WinISO 5.3, and CDBurnerXP.