• The USB drive isn't clearing its drive reference completely when unmounting the DVD/CD-ROM device.
• The Windows operating system isn't recognizing the USB unmount correctly.

Analysis determines there are three variants of encrypted USB drive issues. Each can be experienced concurrently or independently on Windows operating systems. These issues are timing and image specific and can occur with or without Host IPS installed:

• Encrypted USB device password executable hangs related to an issue in Microsoft's FASTFAT driver. In some instances, the USB drive authentication executable can hang, preventing initialization of the USB device. We've determined that Host IPS is not at fault. Intel Secrity has implemented a workaround code enhancement (911048) to avoid the issue on systems where this issue might occur. This workaround is included in Host IPS 8.0 Patch 4.
• Encrypted USB device fails initialization the first time it's installed in a system without CD-ROM hardware installed. We've determined that Host IPS is not at fault. This particular failure can occur intermittently on any system regardless of whether Host IPS is installed. We've determined that Host IPS isn't at fault and no further action is required by us. 
• Encrypted USB device fails to dismount properly if the user disconnects the drive on a system without CD-ROM hardware installed. We've determined that in some instances, the USB device fails to load the CD-ROM File System (CDFS) driver during dismount. This fault can occur when the device is removed, but the fault doesn't become evident unless the device is subsequently attached again, at which point the CDFS doesn't load. We've determined that Host IPS is not at fault and no further action is required by us.