Hi, I don't think this is going to be painful
FWIW: All sorts of programs have drivers (AV, malware, video, audio, music, and probably others), in addition to the hardware drivers most persons think of when they hear/read "driver").
The two drivers noted as not starting (saskutil.sys and sasdifsv.sys are both from the SUPERAntiSpyware program. Do you have this program installed on your system? I confirmed these files on my system, I also use SUPERAntiSpyware.
If so, I suggest that you simply uninstall it and reinstall it...since it doesn't seem to be loading properly.
If you don't have it installed, but have used it previously...then you probably have remnants as startup items which cannot find the program (because you've removed it). Those remnants can be removed from the startup items by using a program such as AutoRuns for Windows - http://technet.microsoft.com/en-us/sysinte...s/bb963902.aspx
If you decide to use Autoruns, please read all pertinent information before doing anything.
There is not necessarily any error that is prevalent here...maybe just an inaccurate uninstall of a program formerly used. No harm done.
I do ask that you confirm that you have previously used this program and have subsequently removed it, if such is the case.
As for login screens...a login screen is not necessary (I don't get one, I don't need one and I've adjusted my system so that it doesn't appear).
The question is: Can you still access your system without going to Safe Mode? If not, please tell us exactly what happens when you boot your system.