When you made the changes in the BIOS did you click on F10 to save the changes and then exit? If you did not save the changes they will not take effect. If this is the case you will need to make those changes again, us the F10 key to save the changes.
Since you are using this computer for work you need to be aware that using the recovery disk or the system recovery partition will return the operating system to the condition it came from the factory. This means that any programs you installed via a download or disc will be gone. This will also remove data saved on the hdd will be gone, pictures, documents, e-mails and addresses, etc. You can take the hdd out of the laptop and install it via a USB connection and transfer your data to either the hdd on that computer or save it on a removable form of media, like an external hdd, flash drive, disc, etc. You will need an external hdd enclosure in order to connect the other computer, you can purchase one for $7.99 at Newegg, shipping is free.
You have posted that you cannot boot into Windows normally or in Safe Mode, but you mention using the repair options. Does this mean that you can boot as far as the Advanced Boot Options? If you can, there is another partition on the hdd which contains the System Recovery partition, but it will convert the operating system to the way it came from the factory, just like the like the results of using the recovery disc.
Edited by dc3, 24 July 2014 - 10:38 AM.