Problème périphérique inconnu( Unknow device)

Bonjour,
j'ai un point d'interrogation devant Unknow device (contrôleurs de bus USB)

Système d'exploitation Windows 7 Edition Familiale Premium (build 7600)
Navigateur web par défaut: Google Chrome
Client e-mail par défaut: Windows Live Mail
Carte mère SMBios version 2.5
TOSHIBA KSWAA 1.00
Bios: TOSHIBA V2.10 05/06/2010 taille: 64Kb
Chipset Northbridge: Intel GL40
Southbridge: Intel 82801IM (ICH9-M)
Processeur Intel Pentium T4400 Penryn Socket P (478) (@45 nm) 2200 Mhz ( L1I: 2 x 32 Ko, L1D: 2 x 32 Ko, L2: 1024 Ko )
Mémoire Mémoire physique totale: 4096 Mo, Type: DDR3, @MHz, 6.0-6-6-15--1T
DDR3 Samsung M471B5673FH0-CF8 2048 Mo PC3-8500F (533 Mhz)
DDR3 Samsung M471B5673FH0-CF8 2048 Mo PC3-8500F (533 Mhz)
Carte Graphique Mobile Intel(R) 4 Series Express Chipset Family

Périphériques ATA TOSHIBA MK5055GSXN GC002M (SATA II, 465.76 Go, Cache: 8 Mo)
Lecteurs CD/DVD TSSTcorpCDDVDW TS-L633C TF03 (DVD-R/DL sequential recording Recorder)
Disque dur TOSHIBA MK5055GSXN ATA Device
Cartes PCI/AGP Stockage
Intel Corporation:ICH9M/M-E 2 port SATA IDE Controller:
Intel Corporation:ICH9M/M-E 2 port SATA IDE Controller:

Réseau
Realtek Semiconductor Co., Ltd.:RTL8101E/RTL8102E PCI Express Fast Ethernet controller:
Atheros Communications Inc.:AR928X Wireless Network Adapter (PCI-Express): WLL6080 802.11bgn Wireless Mini PCIe Card [AR9281]

Affichage
Intel Corporation:Mobile 4 Series Chipset Integrated Graphics Controller:
Intel Corporation:Mobile 4 Series Chipset Integrated Graphics Controller:

Multimédia
Intel Corporation:82801I (ICH9 Family) HD Audio Controller:

Ponts
Intel Corporation:Mobile 4 Series Chipset Memory Controller Hub:
Intel Corporation:82801I (ICH9 Family) PCI Express Port 1
Intel Corporation:82801I (ICH9 Family) PCI Express Port 3
Intel Corporation:82801I (ICH9 Family) PCI Express Port 4
Intel Corporation:82801I (ICH9 Family) PCI Express Port 6
Intel Corporation:82801 Mobile PCI Bridge
Intel Corporation:ICH9M LPC Interface Controller:

Bus Séries
Intel Corporation:82801I (ICH9 Family) USB UHCI Controller #4:
Intel Corporation:82801I (ICH9 Family) USB UHCI Controller #5:
Intel Corporation:82801I (ICH9 Family) USB UHCI Controller #6:
Intel Corporation:82801I (ICH9 Family) USB2 EHCI Controller #2:
Intel Corporation:82801I (ICH9 Family) USB UHCI Controller #1:
Intel Corporation:82801I (ICH9 Family) USB UHCI Controller #2:
Intel Corporation:82801I (ICH9 Family) USB UHCI Controller #3:
Intel Corporation:82801I (ICH9 Family) USB2 EHCI Controller #1:
Intel Corporation:82801I (ICH9 Family) SMBus Controller:
Clavier Clavier standard PS/2
Souris Synaptics PS/2 Port TouchPad
Ecran(s) Moniteur Plug-and-Play générique(LG Display LP156WH2-TLAA)