Hi. I'm currently sharing a laptop with my partner (so painful). I've set up two accounts because he has a habit of collecting viruses as he goes. Probably the sites he visits, but also because he doesn't pay much attention to what he's doing. I should clarify that there is absolutely no way that he would be using torrents/illegal software on my computer…he tends to download music through places like Reddit (so mediafire etc) and I don't always trust random files on download sites.
However, my question is…if he is going to do what he wants anyway and download stuff on another account (non-admin), will that affect the rest of my computer? If he got a virus on his account, is there a way to stop it spreading to my admin account? I'd kind of looked into a sandbox, but I'm not sure what that really means.
There also a Youtube download site he uses that asks for full access to the computer or something through Java. I'm assuming that's a pretty dumb thing to grant access to…but he tends to be fairly click happy and not read popups. Is the 'full access' only to his account?
The obvious answer, of course, is to make him get his own computer again, but he has big plans for Christmas etc. So, for the next while at least, this is my option.
(He's not that bad, just shouldn't be allowed on the internet.. 
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