2 Steam accounts on one computer...?

it is easy
and for valid imputs, check family share on steam. really easy to configure... but all the games are shared

I used to use sandbox for that purpose. Worked like a charm. Cant remeber other method

You can stop the process "explorer.exe" and leave the sandbox with the account opened.

//after that you can turn it on again from the task manager> new task>explorer.exe

Don't see any reason why there would be any problems. My cousin logs on with his account on my laptop all the time.

If you mean using the same account on 2 windows-logins, that should work fine too. However, Steam won't allow opening multiple games at once on different pc's (which would be similar to this) so you'd probably have to close games when switching windows-accounts.

So being that you want to hide your porn, put those folders into your documents. Then, make a second windows account. If the second account isn't an administrator, it can't look at your documents folders. She logs into that one, and uses it to launch/play steam. Steam uses her settings, her saves, and her games that way. None of your data is touched (besides shared data, such as game files (not saves) and other installed programs in public drive places.

In my brother's computer we have more than one Steam account and 0 problems

I had to use google translage for "concubine".

You shouldn't forsee any problems at all.. Steam will see which games are installed (which is shared so no need to double install) but both accounts will have their own gamelist. You only need to login to whichever account once you start Steam..

I have 8 steam accounts at one PC...