When you use a 16-bit PCMCIA card on a Windows Vista-based computer, the card may not be installed correctly. Or, the card may not otherwise function correctly. When this issue occurs, a yellow circle and exclamation point may be displayed next to the device in Device Manager (Devmgmt.msc). Additionally, a status message that resembles the following may be displayed on the General tab of the device properties:

This device cannot find enough free resources that it can use. (Code 12)
If you want to use this device, you will need to disable one of the other devices on this system.
The device instance does not exist in the hardware tree.

Consider the following scenario. A 16-bit application is running on a Windows Vista-based computer. This 16-bit application passes command-line parameters to another application. For example, the 16-bit application calls the ShellExecute function to start another application. Meanwhile, the 16-bit application passes command-line parameters to the newly-started application.

In this scenario, the second application starts. However, the second application does not receive the command-line parameters. Therefore, the second application may not work as expected.

When you try to install a 16-bit program in Windows Vista from a mapped network drive, you may receive an error message that prompts you to insert the setup disk into the drive.