Error Code 800700C1

Question

We have been trying to install updates, but keep getting error code 800700C1.  We have tried all recommended fixes with no success.  We called Microsoft Support and they had no answers.  They screwed up our computer so bad that we had to set the computer back a couple days.

We have Windows VISTA Home Premium.  Please let us know if you need additional information.

Thank you.

Answer 1

Hello Rascal4118,

Method1:

To resolve this issue, follow these steps:

Click Start, and then click Run.

Type cmd in the Open box, and then click OK.

At the command prompt, type net stop wuauserv, and then press ENTER.

Type rmdir /s %windir%\softwaredistribution\wuredir, and then press ENTER.

Type net start wuauserv, and then press ENTER.

Try to install updates again.

Method2:

Please visit the below mentioned MS link for the resolution.

http://support.microsoft.com/default.aspx?scid=kb;en-us;928228

1. Perform sfc/scannow2) Check for **CBS.LOG file.**3) Search for dll files that cannot be replaced/delete or has found error
2. Using Google.com, search for the site that provides dll files. Download the ones you need and replace them.
3. In order to replace the dll files, you need to give urself --> Authorization properties--> Security(tab)--> Advance, full rights.

**Method 3:**Restart your computer and log in "Safe Mode" to install updates and then reboot to log in normal mode. 

Windows Vista or Windows Server 2008

To start your computer in safe mode in Windows Vista or in Windows Server 2008, follow these steps:

1. Click Start and then type msconfig in the Start Search box.
2. In the Programs section, click Msconfig.exe.
3. In the System Configuration dialog box, click the Boot tab.
4. Click to select the Safe boot check box, click Network, and then click OK.

Note The Safe mode with networking option does not work for computers that have dial-up connections to the Internet. You cannot use safe mode with networking support because modem drivers and PC Card drivers do not load in safe mode with networking support. 5. In the System Configuration dialog box, click Restart. The computer restarts in "Safe mode with networking" mode. 6. Install the updates. 7. After the updates are installed, restart your computer in safe mode, and then click to clear the Safe boot check box. 8. In the System Configuration dialog box, click Restart. This option starts Windows in its normal mode.

Hope this helps.

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Answer 2

The only problem with this is that YOU CANT RUN WINDOWS UPDATE IN SAFE MODE....

Answer 3

For me I was a file "c:\Program".

It broke Windows COM.

Answer 4

Hi rascal4118,

Thanks for posting your question to the Answers Forum.

Is this a laptop or a desktop?

Are you on a network with a domain or a server, like a business/corporate network?

Are you using Group Policies at all?

Do you use this computer for programming?

My first suggestion would be to use the System File Checker to verify there are no corrupt files causing this error.

Here's an article on how to do that:

http://support.microsoft.com/kb/936212

You may be able to find more information about the error that could post to this forum in the Event Viewer.

Here's an article about it:

http://support.microsoft.com/kb/947321

Please let us know how this works out.

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Chris

Microsoft Answers Support Engineer

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