cant install windows 7

i changed the internal hard of my sony lap top.now i have to install windows seven.but my dvd rom doesnt work.so i tried installing windows through a flash drive.so i made my flash drive bootable.now when i insert it,my lap top boots &enters windows 7 installation.but then it says it cant find any device for booting.it says insert ur cd or flash drive. now what should i do?how can i install windows?
p.s: i insert flash drive into usb 3.0 . my lap top doesnt have usb 2.0

When installing from the DVD did you set the first boot device to the DVD? This is different across the board.

If it prompts for drivers try supplying the unzipped USB 3.0 driver (from the Sony Support Downloads webpage for your model, possibly in the chipset) there so you don't have to slipstream it. If you can make it to the Drive Selection page there is also a "Load Drivers" link to click there to supply the driver.

   Information

We always assume you have made your Recovery Disks using the OEM manufacturer's Recovery Media Creator app the first day you had your new PC.
& made the Startup Repair CD.
startup repair disc-create

Did you make the OEM manufacturer's Recovery Disks?

How to make Sony Recovery Disks:
http://www.kb.sony.com/selfservice/d...rnalId=C196685

How to use Sony Recovery:
http://www.kb.sony.com/selfservice/m...59775&fes=true

How to use Sony Hardware Diagostics:
http://www.kb.sony.com/selfservice/d...rnalId=C459960

How to order Sony Recovery disks:
1.Go to http://servicesales.sel.sony.com.
2.Enter your computer's model number (for example, PCV-XXXX), and click List Parts and accessories.
3.Follow the online instructions to order the Recovery Media Kit.
If you are not able to access the Sony Direct Accessories and Parts Center Web site, contact a customer service representative at 1-800-488-7669.

No need to add USB3 drivers with the Sony Recovery DVD.

i get that error every now and then when the setup isn't configured correctly, i think it might have something to do with Autouantted.xml also, but i'm not sure...

i did used to get this error alot booting from usb tho, I just found a differant iso and it worked perfectly fine for me, though, i can't guarantee that will work.