VC5 / XP-SP2 and help... You are still using VC5? And you are working under XP? And you want to install SP2? Ok, do it! But then your help-system of VC5 will not work anymore… This is due to a new restriction in IE-Security. But you can force an exception of this new rule for the msdev-process via registry: [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_DISABLE_MK_PROTOCOL] “MSDEV.EXE”=dword:00000000