On January 12, 2016, only the most current version of Internet Explorer available for Windows will be supported. For older OS such as Windows 7 and Windows Server 2008 R2, you will need to upgrade to IE11. Even if you don’t use IE on a PC such as a server, you should upgrade to the … Read moreIf I Remove or Don’t Use Internet Explorer 8, 9, or 10, Can I Avoid Upgrading to Internet Explorer 11?
User Account Control (UAC) can seem mysterious. After all, if I’m a member of the Administrators group, shouldn’t I have access to everything? If you’re a developer, you’ll run into a UAC issue sooner or later. In this post, I’ll cover the basics that every developer should know. Standard User by Default Running applications as … Read moreIf I’m an Administrator, Why Do I Get Access Denied?
If you run notepad elevated (Right click | Run as Administrator), and you try and drag-and-drop a file from Windows Explorer, nothing happens. It looks like it is going to work because the pointer icon changes but the file doesn’t open. Weird, huh? What’s Going On? In the traditional NT Security model (prior … Read moreQ: Why Doesn’t Drag-and-Drop work when my Application is Running Elevated? – A: Mandatory Integrity Control and UIPI
When a new OS is released, a high percentage of applications don’t install or don’t run because they check for a specific OS version. The application or installer checks for a specific version number and exits if it isn’t what is expected. I’ve heard claims of up to 50% of incompatibility issues are due to … Read moreCommon Problems with Checking OS Versions in Code
When I show this tool to developers or QA guys, their eyes light up with excitement. When you work in Application Compatibility, you spend a lot of time documenting problems ;-). In this post, I’ll talk about some of the tricks and tools I use for documenting issues. There’s a slick new tool called the … Read moreUsing the “secret” Windows 7 Problem Steps Recorder to Create Step by Step Screenshot Documents
In most cases, 32-bit applications execute with no issues on 64-bit thanks to WOW64. However, there are a few cases that you may need to make modifications to your application in order for it to work on 64-bit. I’ll cover the common issues and possible solutions in this post. 64-bit OS Basics Issue Solution 32-bit … Read moreCommon Issues with 32-bit Applications Failing on 64-bit
We had a customer in the lab recently and they were quite certain their application was Windows 7 ready. To their surprise, it had several issues in certain situations. In this post, I’ll talk about one of the situations they encountered as well as other stumbling blocks you might run into with UAC Virtualization. Why … Read moreTales of Application Compatibility Weirdness – Demystifying UAC Virtualization
Recently, someone asked me this question in e-mail — “How do I get my application to run elevated when someone launches it?” Instinctively, I responded with a “You need to manifest it.” I got a nice long e-mail in return. 😉 I quickly realized that application manifests appear simple but are quite confusing. Manifests are … Read moreAnswers to Several Application Manifest Mysteries and Questions
If you use the ATL Server performance counter libraries, you may run into a problem on Vista and WS08. The ATL libraries don’t play well with the updates to Windows Resource Protection. WRP enforces restrictions on the registry to prevent corruption of performance counters. ATL breaks these rules and tries to update the registry directly. … Read moreRegistering ATL Performance Counters on Vista and Server 2008
In the compatibility labs, we always give an big overview presentation about Windows application compatibility. There’s a lot of overlap between Vista and WS08 AppCompat but we call out some specific areas that mostly affect WS08. We’ve recorded the WS08 specific section of the presentation and posted it to Channel 9. I hope you find … Read moreWindows Server 2008 Application Compatibility presentation