Having trouble removing a virus. Trojan.ADH.2. When I try a full system scan my computer locks up. I have to do a hard reboot. When rebooting about half the time I find that the boot sequence in the BIOS has benn change and I get an NTLDR is missing error until I enter the BIOS and restore the boot sequence. I am using Windows XP Home SP3 with Norton 360 ver. 5.0 Any suggestions?1 person got this answerI do too