chm can’t be opened

My desktop somehow couldn’t open the chm file which was ok before.
After researching i found it’s the microsoft updates caused this:
http://support.microsoft.com/kb/896358

The solution will be open permissions for this kind of chm file. Copy/paste the following code to a text file then save it as .reg, run it and resolve the problem!

REGEDIT4
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\HTMLHelp]
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\HTMLHelp\1.x\HHRestrictions]
“MaxAllowedZone”=dword:00000001
“EnableFrameNavigationInSafeMode”=dword:00000001

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\HTMLHelp\1.x\ItssRestrictions]
“MaxAllowedZone”=dword:00000001

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