Hi:
See if this works...
Download the drivers from this link below (first or second file listed -- 32 or 64 bit as applicable).
Extract the files onto a usb flash drive.
With the flash drive and W7 installation media plugged into the machine, boot from the W7 installation media.
After you select the install now option, select the Drive Options - Advanced menu, then select the Load Driver option.
You should now see the storage driver files listed.
If you check the box, it will only include the compatible driver.
Follow the prompts and hopefully W7 should install.
Then you can use all of the W7 x64 drivers and software from the dv7t-7000.
DO NOT USE ANY BIOS OR FIRMWARE DOWNLOADS FROM THIS LINK