window 7 the dependency service or group failed to start

Solution - 1
open command prompt (start >All Programs >Accessories > Command Prompt [ps: Right click and run as Administrator]). 

Type in sfc/scannow and then press enter. Reboot the computer.

If the problem still exist after reboot , then you have to reset the TCP/IP stact to installation defaults by typing netsh int ip reset reset.log and reset the WINSOCK entries to installation defaults by type netsh winsock reset catalog. Reboot the machine.

Solution - 2

If the solution-1 din't works then you can try this solution. First open the command prompt with admin privileges. Then You type in 
net localgroup administrators localservice /add 
net localgroup administrators networkservice /add

USB Device Removal using Command Prompt

1. Type diskpart and wait for the diskpart prompt (DISKPART>)
2. Type list volume
3. Note the volume number of the USB drive carefully (use listed properties such as drive letter, label, type and size for help)
4. Type select volume , where  is the volume number noted above
   
5. Type remove all dismount
6. Type exit to quit Diskpart

xcopy in DOS

xcopy source destination /E /I /C