Howdy, Sorry for the weird subject :-). I have a WD Caviar 2420 on a 486 that is used only for simple word processing. After a boot-virus infection and removal with Sophos Sweep, the drive is no longer recognized by the bios (auto detect does not work and if I manually put in drive parameters the bios reports HD failure), BUT the drive works fine as a slave. Yes, I do move the jumper from Slave to Master... I have rechecked for viruses with Sophos and with McAfee and they report no infection. Since the bios does not recognize the drive as master I can do nothing with it, I cannot fdisk it or address it in any manner (obviously). I could delete the partition with the drive as slave, but I don't see that as having any effect on it not be recognized as master. Another Caviar works fine as master. Does anyone have any idea what could cause this, a cure or a diagnosis? Am I forgetting something? Of course, it is not a big loss and I can replace the drive, but I would like to know what causes this and if there is a cure. Thanks much in advance. Best wishes, Bruce Bruce Boschek - Giessen, Germany Curious about the people moderating your messages? Visit our staff web site: http://nospin.com/pc/staff.html