If you are using XP or Vista, please read what follows.
Your XP or Vista set up probably has both an "administrator" and a "user" set-up. If you did not do your own install, then almost-for-sure there is an "administrator" and "user" set up. For whatever reason, the Chinese techies set up computers this way. And then they set it up so that the "administrator" and "user" set-up can run simultaneously in such a manner so that it is not evident to you.
In some nefarious cases, the "Administrator" can actually log the comings-and-goings of the "user".
There are several work-arounds here, none of which require a techie. First, go into your control panel, users and accounts. Check to see how many accounts are enabled on your computer. That will give you the first answer.
You could delete your own account and just run with the administrator account but in so doing, you would loose all of your own files, your personalisations, etc,. etc.
Easier than that, however, is to go to the parallel software market. Buy yourself a "local" copy of Windows XP or Vista in English (readily available everywhere). Then go home. Back up all of your own files to your online email account. Then pop in the XP or Vista and do a clean, yes, clean install. That will get rid of the administrator, any spyware, tracking ware, etc, etc. If you are not savvy enough, find one of your FT friends to do it because if you ask the local Chinese school techie, I can guarantee you that you will be "double-accounted" again.
Any questions, please don't hesitate to ask.