I tried for weeks install windows updates and get this message error (s) found: code 80070645 windows has encountered an unknown error. How can I solve this problem?

Windows Update
Error (s) found: code 80070645 windows has encountered an unknown error.
I had before the shock of two antivirus this proven system restoration started but no help.
Fix it to charge microsoft, but has not helped any.

How can we if this problem, so I can install the updates I need?

Hi Wyattsdaddy,

Thanks for posting your question.

Step 1: Check if Windows update-related services are set to automatic and started.

Click Start, type services.msc in the start search box, right-click to services.msc, and then click Run as administrator.

Check the above services below:
(a) Background Intelligent Transfer Service
(b) cryptographic service
(c) Windows Update

Step 2: Rename the Catroot2 folder

To rename the Catroot2 folder, follow these steps:

1. Click Start, type cmd in the search box and right-click on cmd.exe, and then click Run as administrator.
2. at the command prompt, type the following commands and press ENTER after each line:

net stop cryptsvc
Ren %systemroot%\System32\Catroot2 oldcatroot2
net start cryptsvc
output

3 remove all tmp*.cat to the following folder:

% systemroot%\system32\CatRoot\{F750E6C3-38EE-11D1-85E5-00C04FC295EE}

If any of the files that begin with tmp exist in this folder, do not remove any other files. Files .cat in this folder are necessary for installing hotfixes and service packs.

Important: Do not rename the folder C:\windows\system32\catroot. The Catroot2 folder is automatically recreated by Windows, but the C:\windows\system32\catroot folder is not recreated if is renamed the folder C:\windows\system32\catroot.

Step 3: Reregister DLL files that are associated with Cryptographic Services

To register .dll files that are associated with Cryptographic Services, follow these steps:

1. Click Start, type cmd in the search box and right-click on cmd.exe, and then click Run as administrator.

2. at the command prompt, type the following commands and press ENTER after each command:

regsvr32 /u softpub.dll
regsvr32 /u wintrust.dll
regsvr32 /u initpki.dll
regsvr32 /u dssenh.dll
regsvr32 /u rsaenh.dll
regsvr32 /u gpkcsp.dll
regsvr32 /u sccbase.dll
regsvr32 /u slbcsp.dll
regsvr32 /u mssip32.dll
regsvr32 /u cryptdlg.dll

regsvr32 softpub.dll
regsvr32 wintrust.dll
regsvr32 initpki.dll
regsvr32 dssenh.dll
regsvr32 rsaenh.dll
regsvr32 gpkcsp.dll
regsvr32 sccbase.dll
regsvr32 slbcsp.dll
regsvr32 mssip32.dll
regsvr32 cryptdlg.dll
output

Note: Click OK if prompted.

Restart the computer.

Step 4: Empty the software distribution folder

1. Click Start, type services.msc in the search box, click services.msc, and then click Run as administrator.
2. in the Services (Local) pane, click Automatic updates and then click on stop.
3. reduce the Services (local) window.
4. Select all the contents of the Windows distribution folder, and then delete them.

Note: By default, the Windows distribution folder is located in the drive: \Windows\SoftwareDistribution folder. At this location, the drive is a placeholder for the drive where Windows is installed.
5. make sure that the Windows distribution folder is empty, and then enlarge the Services (local) window.
6. in the Services (Local) pane, click Automatic updates, and then click Start.
7 restart the computer, and then run Windows Update again.

Item appraised: http://support.Microsoft.com/default.aspx/KB/822798

Step 5: Disable the security software
Note: You can enable it later.
Step 6: Scan Run SFC
Please follow the steps below to the auditor of the filesystem as the first steps:

1. Click Start and type cmd in the box start the search.
2. in the area of results, right-click cmd.exe, and then click Run as administrator. You will be asked to type the password for an administrator account. If you are the administrator or type the administrator password, click on continue. Then click on continue.
3. at the command prompt, type Sfc/scannow, and then press ENTER.

Note: The analysis may take some time, so be patient. Windows allows to fix corrupt or missing files it finds. If the information of the installation CD is required to fix the problem, you may be asked to insert your Windows Vista CD.
http://support.Microsoft.com/kb/949104/

Step 7: Components to reset Windows Update
http://support.Microsoft.com/kb/971058

Let us know if that helps.

Kind regards
Clement Kumar.

Microsoft Answers Support Engineer. Visit our Microsoft answers feedback Forum and let us know what you think.

Tags: Windows

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