Most of us are buying OEM drives, without a manual or instructions. There is jumper to enable (PUIS) power up in standby. Are people enabling this feature? It sounds like the kind of setting tivo might not like. edit to add this drive can have "issues" with VIA or SIS serial ATA controllers. I don't know what controller tivo uses. Is it possible there is a compatability issue with your PC which results in a corrupt software installation with winMFS. http://wdc.custhelp.com/cgi-bin/wdc...TIuMjk2JnBfY3Y9JnBfcGFnZT0x&p_li=&p_topview=1 I don't know if this link will work. It's answer 1337 in the Knowledge Base. One solution is to I'll defer to the experts.