Hi cording12 and thanks for added details.
I can't format/partition the hard drive because it's completely blank and needs an operating system on it to do so
Sorry but this is incorrect, if the HDD did have an OS on it and you then formatted and partitioned it you would then effectively have two blank HDDs, the C: (main drive) and the partition which could be allocated the drive letter K: for example.
A new HDD is normally formatted and partitioned in the following way;
1: The boot sequence on the PC is changed in the BIOS to 1: CD/DVD drive and 2: The HDD.
2: The OS disk is placed in the drive tray and the PC is rebooted.
3: A message is displayed on screen saying "Press any key to boot from CD/disk".
4: You then follow the options on screen to format and partition the HDD.
The only difference with what you are attempting is that the boot order must be 1: USB device and 2: HDD.
Whilst in fact the HDD may be damaged I feel that once you change the method that you were using you will be successful, however there may be other issues that prevent you achieving the task at all and two that come to mind straight away are 1: Can the GX620 BIOS be set to boot from a USB device and 2: Where did the OS on the USB device come from, is it the full OS and in fact is it legitimate!http://www.hiren.inf...bios-boot-cdrom
scroll down to item 6 and it explains how to set the Dell BIOS, I am not suggesting that you use any other product or service that may be available there.