Windows 10 Question regarding install & previous data

joshuaRAWR

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Nov 14, 2012
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I just reserved a copy of Windows 10 as a notification popped up on my startbar, when it's released and get access to a non-beta download, if when installing, will i lose everything currently on my computer? Because i was reading the "FAQ" for what i can only assume is the beta, and I'll be upgrading from Windows 7, so this bit caught my eye under "What you can keep"
"Windows 7
Windows settings, personal files and most apps"

Does this mean i would keep mostly everything? I wouldn't want to lose everything as I have quite a bit installed and my download speed isn't the best since i've moved into the country.