Jonas,
I cannot open .chm help files,all I get is a message like:
"The file mk: @ MSITStore:C\Documents and
Settings\HP_Owner\Desktop\Help.chm could not be opened".
Here are a few things to try:
1) Use MJ's Help Diagnostics to check that all the help viewer
components are properly installed and registered.
http://helpware.net/downloads/index.htm#MJs
The only section of the MJ's Help Report that is relevant to your
problem is the one headed "HTML Help Run-time Components".
2) Delete or rename the file hh.dat, which you should find in this
hidden subdirectory:
\Documents and Settings\%username%\Application Data\Microsoft\HTML Help
The hh.dat file stores user-specific information on all the HTML Help
files on your system (favourite topics, changes that you've made to the
size and position of a help window, etc.), and can cause the files to
misbehave if it has somehow been corrupted. Windows will create a new
version of hh.dat when you next open any .chm file.
3) Empty your Temporary Internet Files directory (in Internet Explorer,
Tools > Internet Options > General tab > Delete Files). A full TIF
directory can cause the help files to misbehave.