If you have probblems with a machine using IE you can try re registering there .dll files. This has solved various things for me before.
regsvr32 c:windowssystem32urlmon.dll
regsvr32 c:windowssystem32actxprxy.dll
regsvr32 c:windowssystem32shdocvw.dll
regsvr32 c:windowssystem32mshtml.dll
regsvr32 c:windowssystem32browseui.dll
regsvr32 c:windowssystem32jscript.dll
regsvr32 c:windowssystem32vbscript.dll
regsvr32 c:windowssystem32oleaut32.dll