Since your Skyrim is pirated/cracked then there may be some other factor that's messing up ENB.

Even if you installed through Steam legally and just choose to run it without, maybe you should try running it through Steam again? There might be some kind of update you're unaware of, or maybe running it without Steam causes problems with ENB.

Also, maybe you could try rolling back drivers like mentioned earlier, or head the other direction and get 313.96 Beta. I had 310.90 Beta (not WHQL) when I said I had the same problem and subsequently fixed it. I just upgraded to 313.96 Beta and everything still works the same, so it may not make much of a difference, but it's something to try.

No updates to get. Checked.

Also, I've run through all WHQL drivers now that are still available on NVIDIA site. Now I'm running on the beta, but the problem still persists. I've just given up now and am probably gonna use another version of ENB, though it really bothers me, because I have to configure everything again.

Hello evvry bods

Regarding this rather irksome prob.
In my it case it turned out to have nothing at all to do with ENB files,
I sat puzzling over what had changed with my system for about an hour or so and realised that "GIGABYTE OC_GURU"
was still running in my system tray, so killed it.
Problem GONE, bob`s your auntie.
Hope this helps someone?

luger69(RobC)