On Windows 7 64 bit systems you encounter below error when you attempt to launch any executable by right clicking and choosing “Runas Administrator”.
Too many other files are currently in use by 16-bit programs. Exit one or more 16-bit programs, or increase the value of the FILES command in your Config.sys file.
The “Consent UI for administrative applications” (C:\Windows\system32\consent.exe) process seemingly hangs and thus causes much of UI related issues.
Kill all the Consent.exe process, then you’ll have your system restored back to normal operating status.
Note: When you kill the consent.exe process Windows reports an error as shown below:
More details to be followed up in my TechNet article: Performance Issue: Too many other files are currently in use by 16-bit programs