This blog is closed as of 2/2015. @EricLaw left Microsoft in 2012, but was named an IE MVP in '13 & an IE userAgent (http://useragents.ie) in '14.
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Brain Dump: Shims, Detours, and other “magic”
Note: The “brain dump” series is akin to what the support.microsoft.com team calls “Fast Publish” articles—namely, things that are published quickly, without the usual level of polish, triple-checking, etc. I expect that these posts will contain errors, but I also expect...
30 Jul 2012
Understanding Enhanced Protected Mode
Last week, Andy Zeigler announced the introduction of Enhanced Protected Mode (EPM) over on the IEBlog. In today’s post, I’d like to provide further technical details about EPM to help security researchers, IT professionals, enthusiasts, and developers better understand how this feature works...
23 Mar 2012
Default Integrity Level and Automation
Over on StackOverflow , danimajo asked for help in an interesting scenario. Basically, he’s trying to drive Internet Explorer through automation, but finds that when he navigates to an Intranet site, the hidden browser instance appears and he can no longer control it. What’s going on? ...
3 Aug 2011
For over a decade, Internet Explorer has enabled developers to extend the browser with new URL protocol schemes. These protocols can be one of two types: Asynchronous Pluggable Protocols - COM objects that implement the IInternetProtocolRoot interface and return content to URLMon, usually for rendering...
13 Jul 2011
Beware Cookie Sharing in Cross-Zone Scenarios
Note: I mentioned this problem before ( Troubleshooting Login Cookies #3 ) but it was buried in a long post and this is an issue that lots of folks inside Microsoft hit, so I’m pulling it out into its own post. The Problem From time to time, various users have complained to the IE team that...
10 Mar 2011
Writing Files from Low-Integrity Processes
Internet Explorer 7 introduced Protected Mode , which uses Windows' Integrity Controls feature to help prevent the contamination of the system with data that originates from the Internet. As a part of this feature, Internet Explorer now maintains two stores for the Temporary Internet Files and two Cookie...
26 Aug 2010
Understanding the Protected Mode Elevation Dialog
Internet Explorer 7 introduced Protected Mode, a feature which helps ensure that the browser and its add-ons run with a minimal set of permissions. Code running inside the “Low Rights” process doesn’t have permission to write to your user-profile’s folders or registry keys, which helps to constrain the...
30 Nov 2009
Why Won’t IE Remember My Login Info?
Over on the Microsoft Answers forum , some folks have reported that Internet Explorer doesn’t remember their login details. This is a tricky problem to troubleshoot because there are a number of different problems which get lumped together under this description, and there are a number of different...
10 Sep 2009
User Account Control in Windows 7
It isn't directly related to Internet Explorer, but Mark Russinovich's Inside Windows7 User Account Control article over on TechNet provides an illuminating explanation of why UAC isn't a security boundary, but why it helps protect against malware anyway. For IE8 on Win7, the change is that if the...
22 Jun 2009
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