Thursday, May 18, 2006

Help files over network shares

Came across an interesting issue the other day where a SAP Administrator had enabled sharing of the C: drive on a SAP deployment server, only to find he could no longer access the help files.

Apparently Microsoft has change functionality with MS05-026 to prevent a vulnerability in HTML help files and remote code execution. With security update 892675 installed you can't open HTML help files over network shares.

The workaround I used after scouring posts on the internet was to add the following registry key and then uninstall Internet Explorer Enhanced Security Configuration.
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