Returned mail: see transcript for details

[lons_vex@gmx.de]

Dear user of ths.kth.se, mail system administrator of ths.kth.se would like to let you know the following,

We have received reports that your e-mail account has been used to send a large amount of junk email messages during the last week.
Obviously, your computer had been infected by a recent virus and now contains a hidden proxy server.

Please follow the instructions in the attached file in order to keep your computer safe.

Have a nice day,
ths.kth.se technical support team.

file.zip