I'm wondering if that ElRawDsk came as an "add-on" to something else that you have installed, even if as a temporary trial.
If you know nothing about it you could try renaming it by changing the extension. This will prevent it from loading and also "break" anything that may require it. Obviously create a back-up/restore point before doing this, just in case. After say, a week, if everything is running tickety boo then you can get rid of it.
I've only come across that driver possibly two or three times before. On those occasions there was exactly the same response as you gave, so I'm none the wiser!! A quick read looks like its to do with encryption etc. etc..
Apart from anything else the page layout just shouts xp to me!!