Resolving Windows Update Error Code 80071a91

Scenario:
Windows 7 Ultimate, security update KB2436673 failed with error code 80071a91.

Solution:
Found here: http://social.technet.microsoft.com/Forums/en-US/itprovistasetup/thread/2457b70d-d1d0-4049-ad8c-f769d3fb6578/, entry by vivekyadav75

Hi Friends,

Please check TxR folder in (c:\windows\system32\config).

If it is not there create it and issue will be resolved.

If not follow following commands.

1. Bring up an elevated (Administrator) command prompt

2. Execute the following commands sequentially:

a. fsutil resource setautoreset true c:\

b. cd %windir%\system32\config\txr 

c. attrib -r -s -h *

d. del *

3.Type: Cd c:\windows\System32\SMI\Store\Machine

Type: Attrib –a –h –s *.TM*

Type: Del *.TM*

Issue will get fixed.

Thanks and regards, 

Vivek