For people having problems here is an easy way to root your iconia a100 tablet. The commands can be copied and pasted in terminal emulator very easily. Follow the instructions bellow with the su binary in your SD card first and then if you are not successful try through adb shell in windows.
(internal memory is considered /sdcard and mnt/sdcard, to access an actual sd card requires going to mnt/external_sd/ )
Links will be in the post below since its my first post I can't add links
"/system/bin/cmdclient ec_micswitch '`mount -o remount,rw /system`' "
"/system/bin/cmdclient ec_micswitch '`cat /mnt/sdcard/su >/system/xbin/su`' "
"/system/bin/cmdclient ec_micswitch '`chmod 6755 /system/xbin/su`' "
(internal memory is considered /sdcard and mnt/sdcard, to access an actual sd card requires going to mnt/external_sd/ )
Links will be in the post below since its my first post I can't add links
"/system/bin/cmdclient ec_micswitch '`mount -o remount,rw /system`' "
"/system/bin/cmdclient ec_micswitch '`cat /mnt/sdcard/su >/system/xbin/su`' "
"/system/bin/cmdclient ec_micswitch '`chmod 6755 /system/xbin/su`' "