Error 9 updating iphone 4 to ios4.3

Hi guys.. Anyone experienced error 9 when updating iphone 4 to ios 4.3? Any solutions? My phone is now useless because of this.. stuck in DFU and cannot do restore/recovery..

Did you check your security software settings? http://support.apple.com/kb/TS3125
Error 9: This error occurs when the device unexpectedly drops off of the USB bus and communication stops. This can occur if the device is manually disconnected during the restore process. This issue can be resolved by performing USB isolation troubleshooting, using a different USB dock connector cable, trying another USB port, restoring on another computer, or by eliminating conflicts from third-party security software.
copied from http://support.apple.com/kb/TS1275

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update_baseband: requesting baseband firmware data
update_baseband: received data from host (11207986 bytes)
update_baseband: performing next update stage
bbupdater: BEGIN: Perform stage at second
bbupdater:           BEGIN: Sending 1 Images
bbupdater:                     Waiting for Hello...bbupdater:                     OK
bbupdater:                     Hello received boot mode: ETLSAHModeMaverick
bbupdater:                     Hello response boot mode: ETLSAHModeMaverick
bbupdater:                     Hello reserved fields: 02
bbupdater:                     Starting Maverick Protocol
bbupdater:                     Sending Erase Response: Length 12 Type 161
bbupdater:                     Erase EFS 0
bbupdater:                     Checking Manifest Request: Length 40 Type 162
bbupdater:                     Sent Manifest with length 586
bbupdater:                                DBL_HASH: 00 00 00 00 00 00 00 00 0000 00 00 00 00 00 00 00 00 00 00
bbupdater:                               OSBL_HASH: 00 00 00 00 00 00 00 00 0000 00 00 00 00 00 00 00 00 00 00
bbupdater:                               AMSS_HASH: 00 00 00 00 00 00 00 00 0000 00 00 00 00 00 00 00 00 00 00
bbupdater:                     Sending Hash Response: value 1 success 1
bbupdater:                     Disconnecting...bbupdater:                     OK
bbupdater:                     Waiting for Hello...bbupdater:                     OK
bbupdater:                     Hello received boot mode: ETLSAHModePending
bbupdater:                     Hello response boot mode: ETLSAHModePending
bbupdater:                     Hello reserved fields: 02
bbupdater:                     Sending Image 'OSBL'...
bbupdater:           0x6e050 of 0x6e050 (100 percent)
bbupdater:
bbupdater:                     Took 0.229405 seconds
bbupdater:                     Disconnecting...bbupdater:                     OK
bbupdater:                     Waiting for Hello...bbupdater:                     OK
bbupdater:                     Hello received boot mode: ETLSAHModeComplete
bbupdater:                     Hello response boot mode: ETLSAHModeComplete
bbupdater:                     Hello reserved fields: 02
bbupdater:                     Sending Image 'ELF'...
bbupdater:           0x32000 of 0x12c0000 (1 percent)
bbupdater:           0x6013f of 0x12c0000 (2 percent)
bbupdater:           0x885000 of 0x12c0000 (45 percent)
bbupdater:           0x1085000 of 0x12c0000 (88 percent)
bbupdater:           0x119b000 of 0x12c0000 (93 percent)
bbupdater:           0x12b1000 of 0x12c0000 (99 percent)
bbupdater:           0x12c0000 of 0x12c0000 (100 percent)
bbupdater:
bbupdater:                     Took 6.138110 seconds
bbupdater:                     Disconnecting...bbupdater:                     OK
bbupdater:           END: Sending 1 Images
bbupdater:           Waiting 4 seconds...bbupdater:           OK
bbupdater:           BEGIN: Preparing Initial stage
bbupdater:                     Requested boot mode: kBBUBootModeNone
bbupdater:                     Creating transport, attempts remaining 0...bbupdater:                     OK
bbupdater:                     Modem booted
bbupdater:                     Ping failed, 9 tries left
bbupdater:                     Ping failed, 8 tries left
bbupdater:                     Ping failed, 7 tries left
bbupdater:                     Ping failed, 6 tries left
bbupdater:                     Ping failed, 5 tries left
bbupdater:                     Ping failed, 4 tries left
bbupdater:                     Ping failed, 3 tries left
bbupdater:                     Ping failed, 2 tries left
bbupdater:                     Ping failed, 1 tries left
bbupdater:                     Ping failed, 0 tries left
bbupdater:           END(kBBUReturnIOError): Preparing Initial stage
bbupdater: END(kBBUReturnIOError): Perform stage at second
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1: BBUpdater/10
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