You may be able to answer this question using the Internet Explorer History View program (iehv.exe).*
If your problem started within the last 20 days or so, please download
this tool from
here. You will need to move
the downloaded zip file into a folder (create a new one under 'my
documents') and unzip (extract) it.
Then click on the iehv file (IE History View) to run the program - it
just lists your browser history by giving the date and time for every
site visited.
You will see a list of sites visited over the last 20 days (default
browser setting - it may be less or somebody might have recently wiped
the history).
You can sort the entries into modified date order (by earliest first)
by clicking on the 'modified date' heading. Getting the sort order
right is essential to track your browsing history accurately.
Select all the entries (use 'edit' top of screen, click, then 'select
all' or just use Ctrl and A). All the entries will then be 'ticked'.
Save them to a text file (file, save selected items) for closer
examination.
The MBS bill appears on the fourth day after the billing software was
first downloaded to your computer - look for sexxxpassport.com,
mysexworld.com (note: the installation for mysexworld appears as
'membersmatter.net') or any other suspicious sites when reviewing the
browser history with everyone who used the PC. When the bill pops up
(or porn is viewed), the site also involved is microbillsys.com.
Michael Pollitt, a freelance journalist who has written about MBS twice in the Guardian newspaper, (see
this website) has been looking at people's IEHV's.
He says: "Anybody who seriously thinks (after a very careful review of their entire history) that the billing software downloaded without consent must be prepared to submit their saved Internet Explorer history view file for technical
examination. Despite many emotive claims to date, nobody has provided
proof that installation is without user consent. Please ensure your
history file is in modified date order - earliest first. You're also
advised not to make any changes to your PC until this technical
examination is complete."
Before sending anything to Mr. Pollit, please look at your IEHV very
thoroughly to assure yourself that you and anyone else with access
to the PC did not deliberately download MBS.
*Please note: some people have found problems in downloading their IEHVs, but these are generally available for most computer users.