In Windows 7, 8, 8.1 older .HLP files are not nupported. Since November 2014 patchday also the solution provided by KB917607 doesn’t work anymore. Now Microsoft finally has released a revised KB917607 to fix this problem.
I’ve adressed the HLP file issue within my Blog article Windows 8.1: WinHelp32.exe issue after December Patchday?. Since November 2014 patchday KB917607 doesn’t work anymore. I provided a workaround, but now we have a final fix. Microsoft has released a revised KB917607 package (Windows8.1-KB917607-x64.msu), that is compatible with November 2014 kernel patches. Here are the download links.
Update für Windows 8.1 (KB917607)
Update for Windows 8.1 für x64 Systeme (KB917607) (broken)