New here and love the site!
Ok.....I have just downloaded Defender on a XP system. I ran the FULL scan and it found 14 trojans amongst others. I clicked on the button saying remove and the computer turns off/restarts. This has happened twice and is so frustrating after a 3 hour scan! I then tried running MRT and it found 0 infections. I have such a slow system, try to do something about it and this happens.
I look forward to your help.