I don't know what XP did to this system or hdd, but I cannot install any o/s to it. It is a fairly new 30gb Maxtor that has been low level formatted and checks good using the Maxtor Utilities. I have wiped my bios and reflashed it. Turned off Virus protection in bios. Using one stick of memory that runs XP well. Unplugged everything except cdrom, hdd, bothl on Primary Channel. Hdd partitioned as C: primary, fat32 D: logical fat32 Cannot install to either logical or primary. I have swapped memory locations on mobo with no results. Swapped memory with another system running xp, no results. I have taken this hdd over to another computer that is running xp with an identical Maxtor hdd and swapped hdd. It did not install on that machine either. Errors when transfering files and crashed. I had great difficulty installing W98. Could not install W2k. W98 could not setup itself without many errors and crashes. It is still not fully installed and functionable. Because of the W98 problem, I hesitate to condemn the hdd only. I can use this 30gb, ata 100 hdd as a slave to a 10gb, ata 33 hdd with Wxp installed. this puter will boot up normally and recognize all partitions and function well. Next step is to find another hdd and attempt to install XP on this computer and the other one to see if this is possible. Note that the first install was with the Corporate version that previously installed and is running on the 10gb hdd. The re-install was attempted with my registered Ms XP pro cd as well as the corporate edition cd. My questions are: 1. Why is it that this computer can no longer install a MS o/s product (w98, W2k, Wxp)? 2. Is this hdd bad even though functional in every other area of data transfer?