Diskpart command to format harddisk

http://knowledge.seagate.com/articles/en_US/FAQ/005929en

Diskpart command

Network adapter keeps disconnecting

    It could be this:
    Open the Control Panel - Device manager.
    Open "network adapters"
    Right click your adapter and select properties.
    Click the Power management tab
    UNtick "Allow the computer to turn off ..etc"