Normally non administrators in the pc cannot install the hardware device drivers.(They don’t have rights),but for the some devices we have to allow them to install device drivers. Therefore we have to configure those settings from the local group policy.
login to the windows 7 pc and rung the gpedit.msc in the run
once you go to the local computer policy.
go to the computer configuration>Administrative templates>System>Driver Installation
now we can open the policy called “ Allow non-administrator s to install drivers for these device setup classes”
then click on enable and show button,
now we can add required device classes for this windows.for that we have to open device we can use command “devmgmt.msc”
from here right click on the required device and go to the details tab and select devices class guid from the property drop down list.once you get the id you can right click on it and copy the device id.Then you can add these device ids to the particular policy.
now normal users can install drivers for these type of devices.