When AVG (free) did a scheduled check of my Dell C521 with Media
Edition it reported two files had been changed.

The first file was a user.dll, and I guess that gets altered
regularly.

The other changed file was the HOSTS file. I have not knowingly
messed with this file lately. I did however download and install the
latest update from SpywareBlaster.

Does Spyware Blaster make changes to the HOSTS file?

If not SB, then what could have changed the file?

Thanks