I amm trying to install uipdates but it stops at 15% complete then restarts.

I am trying to install update KB2538243 and it stops at 15% complete, then reboots. This update won’t install and is preventing 6 other updates from installing.

I turn on laptop and Windows starts. Message “Preparing to configure Windows update, Do Not Turn off Computer.” After 15% complete, laptop shuts down then re-starts Windows.

(Sometimes it shuts down a second time, restarts with same message and same shutdown at 15% complete.)

Then the login box appears and I can open Windows. If I then select to update from the control panel, it says 6 updates were OK but a seventh failed error code 643.

Using MSCONFIG, I hide all MS services and reboot. Same update problem and same error code 643.

New Lenovo X1 Carbon laptop, Windows 7 Pro 64 bit, i7-3667U, 8GB RAM, 256 GB SSD SanDisk SD5SG2256G1052E, Intel HD Graphics 4000. No programs other than Microsoft Office 2010 (and all of Lenovo’s bloatware) had been installed

when the update failures began. I have since installed a couple of programs including Norton Antivirus 2013.

Last successful update (MS Office 20110): KB2598243

32 Bit Edition 3/8/13

Last successful Windows 7 update: KB2739159

3/8/13

Six updates are pending: KB2761217, KB2732487, KB2732500, KB2762895, KB2647753 &amp KB2729094.

KB2538243 has never installed and its failure keeps the above 6 updates unsuccessful.

Before this update, many Windows 7 updates were successful, and there were also many failures.

Failures started after installing updates:

Last update before any failures: Intel Graphics adaptor WDDM1.1, WDDM1.2 HD Graphics 4000

3/5/13

2nd to last update before failures: MS Windows Defender

KB915597 (Definition 1.145.1035.0) 3/5/13

3rd to last update before failures: last Windows 7 update KB971033 3/5/13

Used Microsoft’s tool "Automatically diagnose and fix common problems with Windows Update" tool . It reports that it has fixed Windows update components.

Problem still exists.

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