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Here are some steps and advice for troubleshooting Windows Update (WINUP) included in Windows XP.

There is step-by-step technical support information below on how to troubleshoot many MS Windows Update issues:

If information cannot be found at Microsoft Technical Support, or Microsoft Knowledge Base for the specific Windows Update issue, try the following WinUp Frequently Asked Questions steps:

Clearing Temporary Internet Files

1. From the Start menu, click Run.

2. In the Run dialog box, type: cleanmgr. Click OK.

3. In the Select Drive dialog box, select the (C:) drive, and then click OK.

4. In the Disk Cleanup for (C:) dialog box, select the Temporary Internet Files check box only, and then click OK.

5. In the Disk Cleanup dialog box, click Yes.

6. Verify these steps finished.

Creating a Restore Point in System Restore

1. From the Start menu, point to All Programs, Accessories, System Tools, and then click System Restore.

2. In the System Restore dialog box, click Create a restore point, and then click Next.

3. In the System Restore dialog box, in the Restore point description text box, type a name for the restore point, and then click Create.

4. In the System Restore dialog box, click Close.

Unregistering the wuv3is.dll File

1. Close Internet Explorer so site controls are no longer in use.

2. From the Start menu, click Run.

3. In the Run dialog box, type: regsvr32 /u wuv3is.dll. Click OK.

4. In the RegSvr32 dialog box, click OK.

5. Restart the computer.

Deleting the wuv3is.dll File

1. From the Start menu, point to Search, and then click All Files and Folders.

2. In the Search Results window, in the All or part of the file name text box, type: wuv3is.dll. Click Search.

3. After finding the file, select it, and then from the File menu, click Delete.

4. In the Confirm File Delete dialog box, click Yes.

5. Close all open programs and windows.

Configuring the Computer to Show Hidden Files and Folders

1. Double-click My Computer.

2. In the My Computer window, from the Tools menu, click Folder Options.

3. In the Folder Options dialog box, click View, and then in Advanced Settings, select Show hidden files and folders.

4. In the Folder Options dialog box, click OK.

5. Close all open programs and windows.

Deleting the Contents of the Windows Update Folder

1. From the Start menu, point to All Programs, Accessories, and then click Windows Explorer.

2. In the My Documents window, double-click My Computer, double-click Local Disk (C:), double-click Program Files, and then double-click the WindowsUpdate folder.

3. In the right pane, click Wuhistv3.log, and then from the Edit menu, click Invert Selection. If the Wuhistv3.log file is not listed, from the Edit menu, click Select All.

   Note: Deleting the Wuhistv3.log file is not recommended, because it clears the Windows Update download history and the records of any previous downloads. Using the Invert Selection option assures all files, except wuhistv3.log, are deleted.

4. From the File menu, click Delete.

5. In the Confirm File Delete dialog box, click Yes. Close all open programs and windows.

Deleting the Msdwnld.tmp Folder and Downloaded Program Files

1. From the Start menu, point to All Programs, Accessories, and then click Windows Explorer.

2. In the My Documents window, double-click My Computer, double-click Local Disk (C:), and then double-click the WINNT folder.

   Note: If Windows XP was reinstalled, there will not be a WINNT folder. Double-click the Windows folder instead.

3. In the left pane of the Windows or WINNT window, select the Msdownld.tmp folder.

   Note: If the Msdownld.tmp folder does not appear, continue with step 6.

4. From the File menu, click Delete.

5. In the Confirm Folder Delete dialog box, click Yes.

6. In the left pane of the Windows or WINNT window, select the Downloaded Program Files folder.

7. From the Edit menu, click Select All.

8. From the File menu, click Delete.

9. In the Remove Program File dialog box, click Yes.

10. Close all open programs and windows.

Unregistering the iuctl.dll and iuengine.dll Files

1. Close Internet Explorer so that the site controls are no longer in use.

2. From the Start menu, click Run.

3. In the Run dialog box, type: regsvr32 /u iuctl.dll. Click OK.

4. In the RegSvr32 dialog box, click OK.

5. From the Start menu, click Run.

6. In the Run dialog box, type: regsvr32 /u iuengine.dll. Click OK.

7. In the RegSvr32 dialog box, click OK.

Deleting the iuctl.dll and iuengine.dll Files

1. From the Start menu, point to Search, and then click All Files and Folders.

2. In the Search Results window, in the All or part of the file name text box, type: iuctl.dll.

3. In the Search Results window, click More advanced options, select Search hidden files and folders, and then click Search.

4. In the Search Results window, first delete the iuctl.dll file located in the C:\Windows\System32\dllcache folder, and then delete the iuctl.dll file in the C:\Windows\System32 folder. To delete the files, click File, and then click Delete.

5. In the Confirm File Delete dialog box, click Yes for each file.

6. In the Windows File Protection dialog box, click Cancel.

7. In the Windows File Protection dialog box, click Yes to keep these unrecognized file versions.

8. In the Search Results window, click Start a new search.

9. In the Search Results window, click All Files and Folders. In the All or part of the file name text box, type: iuengine.dll. Click Search.

10. In the Search Results window, first delete the iuengine.dll file located in the C:\Windows\System32\dllcache folder, and then delete the iuengine.dll file in the C:\Windows\System32 folder. To delete the files, click File and then click Delete.

11. In the Confirm File Delete dialog box, click Yes for each file.

12. In the Windows File Protection dialog box, click Cancel.

13. In the Windows File Protection dialog box, click Yes to keep these unrecognized file versions.

14. Close all Open Programs and Windows.

15. can For New Updates & Run Microsoft Windows Updtate (WINUP) via the Microsoft Windows Update Site.