A little practice up front could have prevented much bigger headaches later.
A system snapshot ensures you always have the means to restore. Some operating systems have built-in tools for automatic snapshots. If your OS doesn't include a built-in tool, you should install one ...
Back in the days when people used to install software by inserting floppy disks into the slots on desktop computers, a few visionaries dreamt of being able to run software directly on the Internet and ...