Clamwin Portable puts text files on host machine \appdata\local\temp\
After a failed DB definition update at work (probably corporate firewall related) I read the error message. At the end of the failed connection attempts I got to this
Giving up on database.clamav.net...
Update failed. Your network may be down or none of the mirrors listed in c:\users\\appdata\local\temp\tmpcbjuy5 is working. Check http://www.clamav.net/support/mirror-problem for possible reasons.
--------------------------------------
Completed
--------------------------------------
The contents of tmpcbjuy5 below
DNSDatabaseInfo current.cvd.clamav.net