okay, it will not matter to reinstall the drivers
get your drivers and install one at a time with the chipset first, if it is a dell then install the NSS or DSS first and then the chipset, and reboot after each driver, after the chipset is installed the others can really be installed in any order,
are you able to boot to safe mode?
if not then you will have to boot to a rescue disk and install the drivers from a flash drive through the rescue disk OR through the rescue disk uninstall the video driver and see if you can boot to the hard drive and work the video driver from there.