I'm visiting my mom and checking her computer to make sure automatic updates is turned on, etc... She is running Windows XP and has AVG 9.0 as her security software. When I tried to manually run a scan, the scan went through about 100,000 files before the computer shuts down and reboots. It did this three times in a row. In checking the scan log for AVG, I determined that her computer has not successfully completed a scan in over a year. There is also a notification that the scan log has been repaired.
Could this be a virus that shuts down the computer when it is about to be discovered by AVG? If so, how should I proceed?
Thanks in advance.