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SL400 Base System Device driver missing after upgrading to Win7

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Started ‎07-20-2010 by
Modified ‎07-20-2010 by




I have an SL400 and upgraded to windows 7. I installed the operating  system and used thinkvantage system update 4.0 to install the drivers. All went well except 1 thing(actually 2) as the Device Managers says there are 2 drivers missing, displayed -->Other devices-->Base System Device(this displayed 2 times one under like 2 drivers are missing).



SL Systems upgrading to Windows7 


The Unknown base system device is the Ricoh Card Reader.You can get the driver from the below given link

by LOKESHLU on ‎06-28-2012 10:51 PM

Have similar problem. Have Lenovo Y450 . In device manager --->>>>Other devices I am getting Base System Device error.

Have spent 4 hours but of no use. Can any one Help me get this resolved. Will really appreciate this.


Please mail me


Thanks in advance



Lokesh Luthra