1. If you can't open it, you can restore the file association like this:

1, start running, enter: regsvr32c: \ Windows \ System32 \ hhctrl.ocx, and confirm to re-associate the file.

2. Execute hh.exe in windows directory.

Remarks:

1. Sometimes chm files can't be put into the Chinese directory. Including Chinese traditional Chinese medicine names. Try to test the document. The Chinese name has changed.

2. If you can't find hh.exe in the Windows directory, please go to c: \ Windows \ service pack files \ i386.

Catalogue. If you can find Project hh.exe,

Select any CHM file, right-click, change the file opening mode in the properties, and restore the file connection. The CHM file can be opened normally.

2. If there is no there program on your computer.

1. Download hhupd.exe from Microsoft website, install hh.exe and run it.

Hhupd.exe download address: /fwlink/? LinkId= 14498

2. After downloading hhupd.exe, you can run it. The size of this thing is 46 1kb.

3. Find the file "Hhctrl.ocx" in c:\windows\system32, and then run the command "regsvr32c: \ Windows \ System32 \ hhctrl.ocx" to register the control. Problem solved.

3. If you re-register hhctrl.ocx, you still can't read CHM normally.

Then there is probably something wrong with the agreement. HH.EXE uses ms-its and other protocols, which should be served by DLL files. The question is, what is it?

Then Google the ms-its protocol. Finally found it. It was itss.dll.

Do service. But the solution found online is to modify the registry.

To modify the ItssRestrictions registry key to enable a specific security zone, follow these steps:

1. Click Start, click Run, type regedit, and then click OK.

2. Locate and click the following subitem:

HKEY _ local _ machine \ software \ Microsoft \ htmlhelp \1.x \ its restrictions.

Note: If the registry subkey does not exist, please use steps 2a and 2b in method 1 to create the subkey.

3. Right-click the ItssRestrictions subitem, point to New, and then click DWORD Value.

4. type MaxAllowedZone, and then press Enter.

5. Right-click the MaxAllowedZone value, and then click Modify.

6. In the Numeric Data box, type a number between 0 and 4, and then click OK.

7. Exit Registry Editor.

Note: By default, the value of "MaxAllowedZone" is set to 0. The following table summarizes the interpretation of each item by the value of "MaxAllowedZone".

MaxAllowedZone local computer area local Intranet area trusted sites area Internet area restricted sites area

0 allows blocking blocking blocking.

1 Allow Block Block Allow Block

Allow allow prevent prevent prevent

3 allow allow allow allow allow stop

4 allow allow allow allow allow allow allow allow allow allow allow.

The registry can't be opened after modification!

Try a lazy method-re-register the DLL: regsvr32 itss.dll.

4. The language of the operating system is not Chinese (this often happens).

1. See if your OS is a Chinese OS? If your operating system is not in Chinese, go to the control panel to see the Language and Region option, and open it to see if the Region Option is China. This option still has some images for some software.

2. If your CHM file is in Chinese, there may be a default language setting problem. Maybe you are using the English version of WINDOWS, and you have set the language in "Regional and Language Options" and the language and country options in "Advanced to Chinese (China)". That's it.

You can try to change the name of this file, such as deleting redundant symbols.

6. If all else fails, the last way is to convert the CHM format of e-books into PDF files:

CHM Converter is a special file for converting CHM format, which can convert CHM files into common formats such as PDF, TXT and DOC.

After downloading, run the software. The default interface of the software is English. Click "Tools-Language" in the menu, and select "Chinese _ Simplified" in the pop-up dialog box to switch to Chinese. The software also supports many other languages.

After selecting the language, click the "Open" button in the upper left corner and select the CHM file to be converted. If the CHM file is in English, select it from the drop-down menu next to it.

"DEFAILT _ CHARSET", if it is Chinese, you need to select "GB23 12_CHARSET" in the drop-down menu, otherwise garbled code will be generated, and then click "Export" on the right.

To select the file type to be converted, the software supports files in various formats. For example, select "Word97-2003" here, click the "Save Database as" button, and select the saved folder to start.

It has changed.

Can't untie *. Chm file in PS: Window2K;

This problem occurs because the version number of hhctrl.ocx is wrong or registered incorrectly. The reason is that other installed software changed the original version to the old version of hhctrl.ocx In IE6SP 1, the version number of this file should be 5.2.3735.0. You can check the version number of this file in your system.

It is located in the winnt/system32 folder. Copy a copy of 504K (English version) from other same systems (that is, the same version) and paste it into the folder corresponding to your system. Then register.

Note: 1. First replace the file in the winnt/system32/dllcache folder, and then replace the file in the winnt/system32 folder.

2. If you can't see this file, first set the display of hidden files and system files in the Tools-Folder option.

3. The registration method is: Start-Run, enter regsvr32hctrl.ocx, and the dialog box of successful registration will appear, click OK, and then restart the system.