windows xp/server 2003/vista/7 (v6.1)
version 6.1
       corrections
       -----------       
       corrected a memory leak which could bog the system down after extended use of a contiuously
       opened com port, and conditionally yield bluescreens on certain systems
       corrected a problem where an io reqest would sometimes return a busy status to
       user mode, instead the queue is restarted if necessary before adding an io request
       to the queue
       corrected a condition which would blue screen on cancelling write request that hasn't been
       fully sent out usb
       corrected the capabilites return value, which incorrectly reported that timeouts are not supported
       corrected several queue size return values, which affected behavior in the mscomm control       
       corrected dtr/rts value on device insertion, visible when serial enumeration is disabled
       corrected the ability to override baud rate and line control from the inf file
http://www.silabs.com/support%20documents/software/cp210x_vcp_win_xp_s2k3_vista_7.exe