yes, i change boot option to usb, and i use rufus 2.4 to make the usb to a bootable usb.
I don't use rufus to prepare the usb thumb drive, instead the method below:
Step 1: Formating the USB Flash
The following steps we will use the command prompt to create the appropriate Usb flash fomat with diskpart. [Note: It will erase all the data on USB Flash, be careful.]
1. Connect the USB Flash Drive
2. Open the command prompt as administrator (Go Start> All Programs> Accessories, right click on the "Command Prompt" and select "Run as administrator"
3. To find out what number corresponds to the USB Flash Drive you should type the following in the window of the "Command Prompt":
Diskpart
list disk
The number corresponding to your USB will be appear in the list (see the USB and the capacity of)
This number will need in the next step. Suppose that the USB Flash Drive is the disk 1.
4. Format the USB typing the following commands in the same window. Attention, replace the number "1" on disk 1 to the number of your drive as emerged from the above list.
select disk 1
clean
create partition primary
select partition 1
active
format fs = FAT32 quick
assign
exit
Now you can copy the Win 7 installation file into it.