Restart the PC and press the boot menu key (usually , F11 , F9 , or Esc ). Select your USB drive from the list.
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For older computers, set the Partition Scheme to and Target System to BIOS (or UEFI-CSM) . Restart the PC and press the boot menu
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Improved printing and viewing reliability for fixed-layout documents.
If you have a supported Dell machine, you can use the Dell Support Site to download a factory-original Windows 7 image.