Your driver is up to date - if you have a problem with your driver, you can try to re-install the old version as below .
Crystal WDM MPU-401 Compatible
Others
5.1.2535.0
2001-07-01
895.66 KB
2K, XP, 2K3, VISTA, WIN7/32bits
Crystal PnP Audio System MPU-401 Compatible
Others
0
1969-12-31
30.62 MB
2K, XP, 2K3, VISTA, WIN7, WIN8, WIN81, WIN10/32bits
Crystal PnP Audio System MPU-401 Compatible
Others
0
1969-12-31
494.52 KB
2K, XP, 2K3, VISTA, WIN7/32bits
Crystal PnP Audio System MPU-401 Compatible
Others
0
1969-12-31
478.66 KB
2K, XP, 2K3, VISTA, WIN7/32bits
????? ??????? Crystal PnP, ??????????? ? MPU-401
Others
0
1969-12-31
1.29 MB
2K, XP, 2K3, VISTA, WIN7, WIN8, WIN81, WIN10/32bits
Crystal PnP Audio System MPU-401 Compatible
Others
0
1969-12-31
668.03 KB
2K, XP, 2K3, VISTA, WIN7, WIN8, WIN81, WIN10/32bits
Crystal Semiconductor MPU-401
Others
0
1969-12-31
292.13 KB
2K, XP, 2K3, VISTA, WIN7/32bits
Crystal Semiconductor MPU-401
Others
0
1969-12-31
308.78 KB
2K, XP, 2K3, VISTA, WIN7/32bits
Crystal PnP Audio System compatível com MPU-401
Others
0
0000-00-00
76.24 MB
2K, XP, 2K3, VISTA, WIN7/32bits
Crystal Semiconductor MPU-401
0
0000-00-00
4.12 MB
2K, XP, 2K3, VISTA, WIN7/32bits
Crystal PnP Audio System MPU-401-kompatibel
0
0000-00-00
1.88 MB
2K, XP, 2K3, VISTA, WIN7, WIN8/32bits
AW37(AW37Pro) WDM MPU-401 Compatible
0
0000-00-00
114.5 KB
2K, XP, 2K3, VISTA, WIN7/32bits
Crystal PnP Audio System MPU-40-compatibel
Others
0
0000-00-00
68.75 MB
2K, XP, 2K3, VISTA, WIN7/32bits
Crystal PnP Audio System MPU-401 Compatible
0
0000-00-00
1.11 MB
2K, XP, 2K3, VISTA, WIN7/32bits
Crystal WDM MPU-401 Compatible
0
0000-00-00
232 KB
2K, XP, 2K3, VISTA, WIN7/32bits
Crystal Semiconductor MPU-401
Others
0
0000-00-00
293.5 KB
2K, XP, 2K3, VISTA, WIN7, WIN8/32bits
AW37 PnP MPU-401 Compatible
0
0000-00-00
1.48 MB
2K, XP, 2K3, VISTA, WIN7/32bits
Crystal Semiconductor MPU-401
Others
0
0000-00-00
621 KB
2K, XP, 2K3, VISTA, WIN7/32bits
Crystal PnP Audio System MPU-401 Compatible
0
0000-00-00
513.6 KB
2K, XP, 2K3, VISTA, WIN7/32bits
Crystal PnP Audio System MPU-401 Compatible
0
0000-00-00
18.37 MB
2K, XP, 2K3, VISTA, WIN7/32bits
Crystal PnP Audio System MPU-401 Compatible
0
0000-00-00
4.12 MB
2K, XP, 2K3, VISTA, WIN7/32bits
Crystal PnP Audio System MPU-401 Compatible
0
0000-00-00
405.23 KB
2K, XP, 2K3, VISTA, WIN7, WIN8/32bits
AW37(AW37Pro) WDM MPU-401 Compatible
0
0000-00-00
114.5 KB
2K, XP, 2K3, VISTA, WIN7/32bits
Crystal Semiconductor MPU-401
0
0000-00-00
281.92 KB
2K, XP, 2K3, VISTA, WIN7/32bits
Crystal WDM MPU-401 Compatible
0
0000-00-00
110.19 KB
2K, XP, 2K3, VISTA, WIN7/32bits
Crystal PnP Audio System MPU-401 Compatible
Others
0
0000-00-00
390.12 KB
2K, XP, 2K3, VISTA, WIN7, WIN8/32bits
AW35 Pro PnP MPU-401 Compatible
0
0000-00-00
688.45 KB
2K, XP, 2K3, VISTA, WIN7/32bits
Crystal PnP Audio System MPU-401 Compatible
0
0000-00-00
3.16 MB
2K, XP, 2K3, VISTA, WIN7/32bits
Crystal PnP Audio System MPU-401 Compatible
0
0000-00-00
1.14 MB
2K, XP, 2K3, VISTA, WIN7/32bits
AW35/Pro PnP Audio System MPU-401 Compatible
0
0000-00-00
636.5 KB
2K, XP, 2K3, VISTA, WIN7/32bits
Crystal PnP Audio System MPU-401 Compatible
0
0000-00-00
8.38 MB
2K, XP, 2K3, VISTA, WIN7/32bits
Crystal PnP Audio System MPU-401 Compatible
0
0000-00-00
2.37 MB
2K, XP, 2K3, VISTA, WIN7/32bits
AW35Pro WDM MPU-401 Compatible
0
0000-00-00
114.5 KB
2K, XP, 2K3, VISTA, WIN7, WIN8/32bits
Crystal Semiconductor MPU-401
0
0000-00-00
430.75 KB
2K, XP, 2K3, VISTA, WIN7/32bits
Crystal Semiconductor MPU-401
0
0000-00-00
298.83 KB
2K, XP, 2K3, VISTA, WIN7/32bits