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Compaq Presario C554TU Notebook PC Troubleshooting

Error Code 646 Appears when Using Microsoft Update

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This document pertains to HP Notebook PCs.
When installing updates for Microsoft Office applications through Windows Update or through Microsoft Update, one of the following error codes appears:
  • Error 1 0x80070646
  • Error 2 646
  • Error 3 “Error 1606 Could not access network location %APPDATA%”

Windows 7 - Using the Windows Update Troubleshooter

To resolve this issue in Windows 7, use the Windows Update Troubleshooter:
  1. Click Start , enter find and fix problems in the search field, then select Find and Fix Problems from the search results list.
    Figure 1: Search results
    Search results with Find and fix problems selected
  2. Under the System and Security troubleshooting category, click Fix problems with Windows Update .
    Figure 2: Control Panel
    Control Panel with System and Security selected
    If prompted for an administrator password or confirmation, type the password or provide confirmation.
  3. When the Windows Update Troubleshooter opens, click Next and follow the on-screen instructions.
    Figure 3: Windows Update troubleshooter
    Windows update troubleshooter
If, after running the Windows Update Troubleshooter, you still experience this error, see Microsoft Support for further information.

Windows Vista - Using the Microsoft Fixit button

To resolve this issue in Windows Vista, click the following Fix-It button.
Or, if you cannot use the Fix-It button, see Microsoft Support for further information.