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#11
We have a ton of valuable tutorials right here! Windows 7 - Tutorial Index
Have fun
This looks like a pretty decent one with easy to understand videos.
http://www.gcflearnfree.org/windows7
Lots of good advice here.
Although perhaps start with working out a few main tasks you need to do and then branch out from there. There is a lot to do on the computer.
Simple things like using the browser, sending an email, watching a video clip, navigating to favourite locations of files, Windows Update etc.
One tip - become familiar with the control panel. Open and close everything you see. You can always cancel out of anything if you think you've gone too far.
And if in doubt, ask :)
Agreed on the good advice. However, I'd go with the video recommendations first - especially since the OP said "not even sure what files are".