if pwde nya ma connect/slave (or naa sya spare enclosure) sa laing computer, it could be very possible to fix it w/o AVG rescue and w/o resorting to reformat.
once ang drive ma-connected sa another computer , navigate to /Windows/system32/drivers/ rename the ..sys file extension
of all avg**** files to whatever. I believe AVG rescue works the same way. here imo lang gi-manual rename.
after renaming files, replace ang drive back sa laptop and boot.
dili ko technician but i say that just might work
AVG Support and Discussion Forums | AVG Worldwide