MBox External Disappeared

[bluestudio]

I have been using Pro Tools 10 daily for the last 7 months on a home built Windows 8 PC with no problems. This week, the “MBox External” disappeared in the MIDI enable list and as an option on MIDI tracks.
“Mbox Control” is still there. I have also been using the freeware MIDIOX program for the last 3 months for sysex data filing. (I don’t know if that had an effect and caused the problem).

I tried the forum search and didn’t find this problem.
I need to know the procedure for restoring the MBox External for MIDI tracks. Do I have to uninstall, then re-install the MBox?

My last resort is to restore the hard drive from an image created a month ago.

Thanks

Sandra Report:

SiSoftware Sandra

ID
Host Name : Producer-PC
Workgroup : STUDIO

Computer
Model : MSI MS-7751
Serial Number : To be fille***********
Chassis : MSI Desktop
Mainboard : MSI Z77A-GD65 (MS-7751)
Serial Number : To be fille***********
BIOS : AMI (OEM) V10.5 04/27/2012
Intel vPro : 8.00.10.1464
Total Memory : 15.89GB DIMM DDR3

Processors
Processor : Intel(R) Core(TM) i7-3770K CPU @ 3.50GHz (4C 8T 3.5GHz, 3.5GHz IMC, 4x 256kB L2, 8MB L3)
Socket/Slot : FC LGA1155

Chipset
Memory Controller : MSI Core (Ivy Bridge) DRAM Controller 100MHz, 2x 8GB DIMM DDR3 1.6GHz 128-bit, Integrated Graphics

Memory Module(s)
Memory Module : G.Skill F3-12800CL9-4GBXL 4GB DIMM DDR3 PC3-12800U DDR3-1600 (11-11-11-29 5-40-13-6)
Memory Module : G.Skill F3-12800CL9-4GBXL 4GB DIMM DDR3 PC3-12800U DDR3-1600 (11-11-11-29 5-40-13-6)
Memory Module : G.Skill F3-12800CL9-4GBXL 4GB DIMM DDR3 PC3-12800U DDR3-1600 (11-11-11-29 5-40-13-6)
Memory Module : G.Skill F3-12800CL9-4GBXL 4GB DIMM DDR3 PC3-12800U DDR3-1600 (11-11-11-29 5-40-13-6)

Video System
Monitor/Panel : ViewSonic VX2703 SERIES (1920x1080, 33.1")
Video Adapter : Intel(R) HD Graphics 4000 (16CU 16SP SM5.0 350MHz/1.15GHz, 32MB DDR3 1.6GHz 128-bit, Integrated Graphics)

Graphics Processor
OpenCL GP Processor : Intel(R) HD Graphics 4000 (16SP 16C 350MHz/1.15GHz, 1.6GB DDR3 1.6GHz 128-bit, Integrated Graphics)
Compute Shader Processor : Intel(R) HD Graphics 4000 (16SP 16C 350MHz/1.15GHz, 64MB DDR3 1.6GHz 128-bit, Integrated Graphics)

Storage Devices
Seagate ST1000DM003-9YN162 (1TB, SATA600, 3.5", 7200rpm) : 932GB (E:)
KINGSTON SH103S3120G (120GB, SATA600, SSD) : 112GB (C:)
Seagate ST2000DM001-1CH164 (2TB, SATA600, 3.5", 7200rpm) : 2TB (M:)
PLEXTOR DVDR PX-L890SA (SATA150, DVD+-RW, CD-RW, 2MB Cache) : N/A (D:)

Logical Storage Devices
General (E:) : 932GB (NTFS) @ Seagate ST1000DM003-9YN162 (1TB, SATA600, 3.5", 7200rpm)
System Reserved : 100MB (NTFS)
Spare (M:) : 2TB (NTFS) @ Seagate ST2000DM001-1CH164 (2TB, SATA600, 3.5", 7200rpm)
Hard Disk (C:) : 112GB (NTFS) @ KINGSTON SH103S3120G (120GB, SATA600, SSD)
Optical Drive (D:) : N/A @ PLEXTOR DVDR PX-L890SA (SATA150, DVD+-RW, CD-RW, 2MB Cache)

Peripherals
LPC Hub Controller 1 : MSI Panther Point LPC Controller
LPC Legacy Controller 1 : T0 10-05
Audio Device : MSI Panther Point High Definition Audio Controller
Audio Codec : Realtek Semi High Definition Audio
Disk Controller : MSI Panther Point 6 port SATA AHCI Controller
Disk Controller : MSI Asmedia 106x SATA Controller
USB Controller 1 : MSI Panther Point USB xHCI Host Controller
USB Controller 2 : MSI Panther Point USB Enhanced Host Controller #2
USB Controller 3 : MSI Panther Point USB Enhanced Host Controller #1
SMBus/i2c Controller 1 : Intel ICH SMBus

Printers and Faxes
Printer : Send To Microsoft OneNote 2010 Driver (1200x1200, Colour)
Printer : Microsoft XPS Document Writer v4 (600x600, Colour)
Fax : Microsoft Shared Fax Driver (200x200)
Printer : HP Photosmart 5520 series (600x600, USB, Colour)

Network Services
Network Adapter : Intel(R) 82579V Gigabit Network Connection (Ethernet, 100Mbps)

Operating System
Windows System : Microsoft Windows 8 Professional 6.02.9200
Platform Compliance : x64