Hello bosco,
The person could certainly be monitoring the activity on your
computer.
I don’t think for you this is a wireless issue as much as a network
security issue. Also just because the person has access to wires
running to your computer does not mean they have access to it, just
that they could have.
On the Windows XP computer it would be possible to set up reasonable
security but probably not unbreakable security if the teen is skilled
enough. Even if I was to walk you through how to secure your LAN, it
could be possible that there are already programs installed that would
undermine this.
For example, your internet history on a Windows XP computer is
installed at:
C:\Documents and Settings\*your login name*\Local Settings\History
If your C: is shared on your network, all a person would have to do is
type in \\*computername*\c\documents and settings\loginname\local
settings\history to get your complete internet history. Similarly,
\\computername\c\documents and settings\loginname\desktop would show
what files are on your desktop
All your files and folders could be shared on your network in a
similar way which would make it easy to gain access to them from
another computer on your network. To disable this, you can follow the
instructions here: http://help.earthlink.net/techsupport/xmldocs/windows_XP/5877.help.html
It is also possible to control a computer remotely, even through the
internet! To gain access to your computer over the internet someone
would have to have set up a program or make you install a nasty
program (via email or other means). But if someone has access to the
computer directly, there are countless ways to keep tabs on a user.
There are programs available that will make screenshots of the
computer screen at certain intervals and transfer them to another
computer for storing. There are similar programs that will capture
every key typed while Windows is running and store them on a different
computer. Also files that are deleted from your computer can be
recovered (which is why government agencies smash and burn hard drives
when they are finished with them).
Securing your computer at this point would involve making sure that
there are no such programs installed at the moment. The easiest way to
do this would probably be to completely format your hard drive and
reinstall Windows XP and then secure everything.
I am not sure how important this is to you, but then you should
install a security program such as McAffee Internet Security.
http://www.mcafee.com/myapps/is5/default.asp Even if you were not to
reformat your computer, this program would catch any network
connections to your computer.
I use this program myself and always get a warning when any strange
program attempts to send out information from my computer or if
someone tries to access my computer. You can then permit or deny that
the information be transmitted. It gives the ip address of the
computer that is attempting to make contact (with which you could
figure out which computer on the network or who on the internet it is
and what time it happened at). If you do buy this program, you would
probably find a better deal in a retail store depending on where you
are. It comes with a VirusScan, Firewall, Spyware/Adware Protection
and other useful things. It is also probably the easiest Internet
Security Software to use, but you will certainly find other products
as well at a computer store near you.
I hope that you find this answer useful and informative. If you need
any clarifications please let me know and I will do my best to further
assist you.
tisme-ga
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