[LG Optimus 3D] ttamyurek:
This is my first message in xda developers, hope to find a solution here. I want to unroot and clean my phone. So I downloaded the stock rom, the KDZ FW Updater, windows enabler,.. All the mobile drivers are okay, i plugged in the phone with usb in sw update mode, i started the upgrade with KDZ_FW_UP.exe, it waits, extracts for a while, then win7 says it is not responding. When i look at the log, it crashes at the "Call fn_StartUpgrade" step. I tried it in several pc's but still the same problem. How can i fix this? Here is the log:

13:57:39 : Start Date : 2013-09-13 13:57:39
13:57:39 : -------- QM_Version mode ---------
13:57:39 : ***** Check Tool Version *****
13:57:39 : Tool version : 1.6.7.3
13:57:39 : UpgradeDLL version : 2.1.2.0
13:57:39 : Current Dir : C:\ProgramData\LGMOBILEAX\B2C_Client
13:57:39 : LGE USB Driver Version : 5.0.0.0
13:57:39 : Android PDLV Version :
13:57:39 : Android NDLV Version : 3.10.0.0
13:57:39 : ******************************************
13:57:39 : [C:\ProgramData\LGMOBILEAX\Phone] Try to delete folder
13:57:39 : SetEmerModeAT()
13:57:39 : _IsConnectedPhone Call
13:57:39 : _IsConnectedPhone(0)
13:57:39 : 0 - NotConnected.
13:57:39 : 1 - Normal connect success
13:57:39 : 2 - Emergency connect success
13:57:39 : PhoneÀÌ Notconnect »óÅÂÀÌ¸ç Port¸¦ ÀâÁö ¸øÇß°í Åë½Å ÇÒ¼ö¾ø´Â »óÅÂÀÓ.
13:57:39 : ¾÷±×·¹ÀÌµå ÇÏ´Ù°¡ ½ÇÆĞÇÑ ±â·ÏÀÌ PC¿¡ ³²¾ÆÀÖÀ¸¸ç Æù°ú Åë½ÅÀ» ÇÒ¼ö ¾ø±â ¶§¹®¿¡
13:57:39 : È¯°æºĞ¼® ´ë½Å ¸¶Áö¸·¿¡ ¾÷±×·¹ÀÌµå¸¦ ½ÃµµÇÑ °ªÀ» °¡Áö°í ¾÷±×·¹ÀÌµå ½Ãµµ¸¦ ÇÔ.
13:57:39 : È¯°æ ºĞ¼® ºÎºĞÀº Pass ÇÏ°í File download / Decrypt °úÁ¤À¸·Î PassÇÔ.
13:57:39 : *****CheckOS Start********
13:57:39 : Microsoft_Windows7_Professional_Service Pack 1
13:57:40 : B-ÀÎÁõ °Ë»ç ÆÄ¶ó¸ŞÅ¸ - ESN_IMEI : , Model :
13:57:40 : Phone type Compare start
13:57:41 : ****************CheckAndDownload********************
13:57:41 : Version : V10C_00
13:57:41 : *****OpenURL Start*****
13:57:41 : [C:\ProgramData\LGMOBILEAX\Phone] Try to delete folder
13:57:41 : RemoveDirectory1 Error(2):C:\ProgramData\LGMOBILEAX\Phone
13:57:41 : *****OpenURL Start*****
13:57:42 : CreateFile : C:\ProgramData\LGMOBILEAX\Phone\V10C_00.kdz
13:57:42 : =============HEADER : Range:bytes=0-=====================
13:57:42 : *****OpenURL Start*****
13:57:43 : *****DownLoad Start***** (Size:465835175)
14:06:35 : Receive OK 465835175/465835175
14:06:35 : =============TAIL : 465835175=====================
14:06:35 : Receive Size (465835175/465835175)
14:06:35 : *****CheckWebDownError Start*****
14:06:35 : File Error check OK
14:06:35 : ******Extract Start C:\ProgramData\LGMOBILEAX\Phone\V10C_00.kdz*****
14:06:35 : Model Dll Dir(C:\ProgramData\LGMOBILEAX\Phone\)
14:06:35 : Check 2G-4G big size kdz file..
14:06:35 : File Size = 465835175
14:06:41 : Extract kdz file Success.
14:07:17 : Extracted C:\ProgramData\LGMOBILEAX\Phone\\V10C.wdb

14:07:17 : WDB(or DZ) FullPath(C:\ProgramData\LGMOBILEAX\Phone\\V10C.wdb)
14:07:17 : Extracted C:\ProgramData\LGMOBILEAX\Phone\\LGP725.dll

14:07:17 : Model dll FullPath(C:\ProgramData\LGMOBILEAX\Phone\\LGP725.dll)
14:07:17 : NNNNN WDB FullPath(C:\ProgramData\LGMOBILEAX\Phone\V10C.wdb)
14:07:17 : NNNNN Model dll FullPath(C:\ProgramData\LGMOBILEAX\Phone\LGP725.dll)
14:07:17 : Extract End C:\ProgramData\LGMOBILEAX\Phone\V10C_00.cab
14:07:18 : ------------------Model.dll Information-------------------
14:07:18 : Filename : LGP725.dll
14:07:18 : Version : 1.0.0.5
14:07:18 : File size : 270336
14:07:18 : File date : 2012/01/30-17:11:32
14:07:18 : PC Created date: 2013/09/13-14:07:17
14:07:18 : ----------------------------------------------------------
14:07:19 : *****Check LGCM Programs Start*****
14:07:19 : LGCM Programs Not Found - OK and ready to upgrade
14:07:19 : m_pLGCyonUpdate status change.
14:07:20 : *****WorkModelDLL Start*****
14:07:22 : strPhoneBinaryPath(C:\ProgramData\LGMOBILEAX\Phone\V10C.wdb)
14:07:22 : strModuleDir(C:\ProgramData\LGMOBILEAX\Phone\)
14:07:22 : strModelDLLPath(C:\ProgramData\LGMOBILEAX\Phone\LGP725.dll)
14:07:22 : _DetachDLL Call
14:07:22 : _DetachDLL Call End
14:07:22 : Call fn_StartUpgrade

Here is a screenshot: