Thanks for this!
We have 4 Haswell-based PCs at our house and two of them failed to install KB4517389. The two that failed are on Z87/Z97 motherboards with overclocked CPUs and RAM. The two that successfully updated are on B85 and H97 boards so I thought the page fault error might have something to do with the overclocked RAM. That wasn't the problem. Deleting ArcCtrl.sys fixed it.
We have 4 Haswell-based PCs at our house and two of them failed to install KB4517389. The two that failed are on Z87/Z97 motherboards with overclocked CPUs and RAM. The two that successfully updated are on B85 and H97 boards so I thought the page fault error might have something to do with the overclocked RAM. That wasn't the problem. Deleting ArcCtrl.sys fixed it.