Running a boot time scan immediately after install, avast found a trojan w32:gen {other} and presented the standard 8 option menu. i selected delete, #1. This worked fine, with a confirmation message that it deleted, and showed the [1] I selected immediately to the right of the word [Exit]
Later, another file came up as infected: Same trojan.
But, when I selected [1] to delete, it showed the selection was [8] which is ignore all.
Obviously, no more infected files were found. I'm currently in the middle of a manual scan, and it seems to be finding the files ok so far, but the error bothers me a bit.
I am on a Compaq Presario, running Win XP Home, with a PS2 keyboard (with all the nifty useless extra keys, though I think those are turned off) and I used the numbers above the keyboard, not the keypad.
I read a variety of 9 pages of topics from a search for "boot time scan" trying to find something similar before I posted. I hope this isn't a duplicate.
Oh, and thanks to all the experts who are (I believe) volunteering their time here. Great job, folks!