Previously, in Windows 10, I was able to open .hlp files. Now, after I have upgraded to Windows 10 Anniversary Edition, I can no longer open .hlp files.
Can someone help me?
In order to open .hlp files in windows 10, you must have a patched version of winhelp32.exe from windows XP in your c:\Windows folder.
If you could open .hlp's before, you must have had this file in your system.
Performing an upgrade would overwrite the c:\Windows folder, thus removing winhelp32.exe from your system.
Follow the directions at this link to inject winhelp32.exe into the proper location in Windows 10.
I found a solution that does not involve downloading any third-party utilities. Credit goes to Andreas Pollak for the original solution.
This answer assumes you are running a 64-bit US English version of Windows 10. You'll need to adjust the commands if you are using a 32-bit version or if you are in a different locale.
Then, in an administrative command prompt, switch to the folder containing the download and run the following commands. (You may find it easiest to run them one at a time.)
md ContentMSU expand Windows8.1-KB917607-x64.msu /F:* .\ContentMSU cd ContentMSU md ContentCAB expand Windows8.1-KB917607-x64.cab /F:* .\ContentCAB cd ContentCAB cd amd64_microsoft-windows-winhstb.resources_31bf3856ad364e35_6.3.9600.20470_en-us_c3a9a33a1aee3495 takeown /f %systemroot%\en-us\winhlp32.exe.mui icacls %systemroot%\en-us\winhlp32.exe.mui /grant "%UserName%":F ren %systemroot%\en-us\winhlp32.exe.mui winhlp32.exe.mui.w10 copy winhlp32.exe.mui %systemroot%\en-us\winhlp32.exe.mui cd .. cd amd64_microsoft-windows-winhstb_31bf3856ad364e35_6.3.9600.20470_none_1a54d9f2f676f6c2 takeown /f %systemroot%\winhlp32.exe icacls %systemroot%\winhlp32.exe /grant "%UserName%":F ren %SystemRoot%\winhlp32.exe winhlp32.exe.w10 copy winhlp32.exe %systemroot%\winhlp32.exe
After this you should be able to open .hlp files.
@HolisticDeveloper's answer indeed worked to bring back
winhlp32.exe on Windows 10. However, the
Find tab was still missing so it wasn't possible yet to perform a full-text search of the help file. I've found that the following additional commands bring that back as well:
cd .. cd amd64_microsoft-windows-winhstb.resources_31bf3856ad364e35_6.3.9600.20470_en-us_c3a9a33a1aee3495 copy ftsrch.dll.mui %systemroot%\syswow64\en-us\ftsrch.dll.mui cd .. cd amd64_microsoft-windows-winhstb_31bf3856ad364e35_6.3.9600.20470_none_1a54d9f2f676f6c2 copy ft*.dll %systemroot%\syswow64