How-To Geek

i have a pc running win 7, i have an iomega 2 Tb network nas drive, connected via ethernet cable,
i have a 1 Tb hdd in an external caddy, connected via usb 2.0
now the pc will detect both drives, but only for 15 or 20 mins at a time , then i have to restart them,
the 1 tb won't allow transfers over 400mb with out suddenly dissapearing and windows saying drive "unavailable" file system for this drive is ntfs.
the iomega i don't know about, probably fat32, both drives only a few months old, and both "dissappear" with out warning or obvious fault or error code etc

i'm thinking its a pc fault not a drive fault as both drives work fine in my mates PC, i just can't think what it might be,
any idea's ? thanks

thanks, Raphoenix, i'll give your ideas a go, i'll have to check whats essential and what isn't in device manager and go from there, not sure what a high performance power plan is, but I'll find out,
thanks for your reply i'll let you know how i get on,

Go through EVERY ITEM in Advanced Settings of High Performance Power Plan and insure nothing is set to conserve power.

Also go through every setting in your mate's PC and and duplicate the settings on your PC.

Post the make and model number of your machine or motherboard.