windows update error 80070003

And your Windows Operating System is?

For Win XP -

Some have had success with

1. Stop the Automatic Updates service, clear the contents of the DataStore and Download folders, and restart the Automatic Updates service.
Stop the Automatic Updates Service.
Click Start, Choose Run, In the Run box, type services.msc.
Click OK.
Right-click the Automatic Updates service.
Select Properties.
Under Service status, click Stop.
Click OK.

2. Delete the Contents of the DataStore and Download folders.
Click Start, Choose Run, In the Run box, type %windir%\SoftwareDistribution
Click OK.
Delete the contents of both the DataStore and Download folders

3. Start the Automatic Updates Service
Click Start, Choose Run, In the Run box, type services.msc.
Click OK.
Right-click the Automatic Updates service.
Select Properties.
Under Service status, click Start.
Click OK.

This procedure will erase your history on the Windows Update Site.

You receive a "0x80070002" or "0x80070003" error code after you download an update from Windows Update, from Microsoft Update, or from Windows Server Update Services
http://support.microsoft.com/kb/910336

When searching for available updates on the Update site, you see the 0x80070002 or 0x80070003 error
http://update.microsoft.com/windowsupdate/v6/showarticle.aspx?articleid=17&ln=en&IsMu=False

Error message when you try to download updates from the Microsoft Windows Update Web site or from the Microsoft Update Web site on a Windows XP-based computer: "0x80070003"
http://support.microsoft.com/kb/916248

Vista perhaps?

Remove the temporary update files that Windows uses to identify updates for your computer.
(Provide the Administrator password or confirmation if prompted to do so.)

1. Stop the Windows Update service (make sure you are logged on as an Administrator)

Start button || Control Panel ||System and Maintenance ||Administrative Tools
Double-click Services
(Provide the Administrator password or confirmation if prompted to do so.)
Right-click the Windows Update service and click Stop.

2. Click Start, type %windir% in the Start Search box, and then press ENTER.

Locate and open the SoftwareDistribution folder.
Clear the contents of the DataStore folder and the Downloads folder.

3. Start the Windows Update service

Start button || Control Panel ||System and Maintenance ||Administrative Tools
Double-click Services
(Provide the Administrator password or confirmation if prompted to do so.)
Right-click the Windows Update service and click Start.

This procedure will erase your history on the Windows Update Site.

Important: Reboot

You can check which updates are installed on your computer  by –

Start button ||  Control Panel || Programs
Under Programs and Features - click View installed updates.

Windows Update error 80070003
http://windowshelp.microsoft.com/Windows/en-US/Help/dc8636cd-4742-4e4e-b07c-a8cc9c684b261033.mspx 

You receive a "0x80070002" or "0x80070003" error code after you download an update from Windows Update, from Microsoft Update, or from Windows Server Update Services
http://support.microsoft.com/kb/910336

Error message when you try to download updates from Windows Update on a computer that is running Windows Vista: "Error 0x80070003 The system cannot find the path specified"
http://support.microsoft.com/kb/942967

Or are we dealing with Windows 7 -

Windows Update error 80070003
http://windows.microsoft.com/en-US/windows7/Windows-Update-error-80070003

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TaurArian [MVP] 2005-2010 - Update Services