Trust I seek and find ...
| What can be found at E-mail
If you search in the search engine via E-mail, you will find a lot of useful information about the owner of this email address, for example: statements in guestbooks, in forums, and also if people have filled out questionnaires, they will also find them, usually they write all in questionnaires sometimes the truth about yourself also happens
What can be learned by IP
You can also see which ports are open on this computer.
This can be done with any scanner.
For example, the following ports appeared on the computer: 139 (NETBIOS), 11476 (icq).
There is a possibility that the ports of known Trojans will be discovered on the computer (that is, you can take a client and connect to a remote computer), but lately many Trojans have been able to set a password for connecting to the server and an arbitrary port (which will not allow to determine when scan type "Trojan horse").
Be careful when scanning, because
some programs define it, for example, Outpost Firewall .
It would not be superfluous for your friends to find out this information, share the article with them!