dellBrandan,
This is a volunteer forum and many would like to help you.
Please include as much relevant history about this computer.
You bought this from Dell? When? What model?
Is this a laptop?
On new laptops the UEFI boot block is method used to reduce unauthorized chkangfes to a computer, especially laptops which can be easily transported. Any attempt to alter the hardware or system software is blocked by the UEFI boot. Did dell not explain this to you?
Without the details, forum members just have to guess ate your problem. Most Windows users never have issues with the UEFI boot protection.
For general information about Unified Extensible Firmware Interface:
http://en.wikipedia.org/wiki/Unified_Extensible_Firmware_InterfaceIntel developed the original EFI (Extensible Firmware Interface) specification. Some of the EFI's practices and data formats mirror those from Microsoft Windows.[5][6] In 2005, UEFI deprecated EFI 1.10 (the final release of EFI). The Unified EFI Forum manages the UEFI specification.
Windows 8.1 will use the UEFI ato full advantage to stop malware.
The 64-bit versions of Microsoft Windows Vista[32] and later, 32-bit versions of Windows 8, and the Itanium versions of Windows XP and Server 2003 can boot from disks with a partition size larger than 2 TB.
Of curse, there is a lot more to say about UEFI boot. You may have been infected by a virus that was found on the next boot.
Please give details.