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Missing SENSAPI.dll file

Upon Windows startup, I receive an error message that SENSAPI.dll file is missing. I have Windows 98 Second Edition. Microsoft tells me that I need to download the Instmsiw.exe file to fix it. When I attempt to install the downloaded file, I'm given a message that the "specified service already exists". So I'm back at square one and do not know how to replace the missing .dll file. Can anyone help me with layman terms instructions?

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Download just that file

In reply to: Missing SENSAPI.dll file

and put it into your Windows\system folder (or system32 folder if XP) after you unzip it.

When you use the following link, scroll to the bottom of the page and click the RED download link (the links above this download link are for various sites and not the file)


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Layman terms -- not really! We're talking computer systems.

In reply to: Missing SENSAPI.dll file

Layman terms -- not really. We're talking computer systems.


Perhaps Toni's suggest will work regardless of the file offered by that site is version 5.1.2600.2180, 6,656 bytes in size, and initially issued for/with WinXPSP2, and to be resident in the \I386 folder. The version used on a Win9x system with Internet Explorer v6.x at least, is usually the version 5.50.4807.2300, 6,416 bytes in size, and located in the \Systems folder. Since this file comes with IE, it is usually found in the MOBILENT.CAB file that may or may not be resident on a user's computer.

What you could do -- learn:

1. When confronted with a DLL file problem, a copy of some Microsoft media may already be owned from which the file can be extracted, "Definition and Explanation of a .DLL file (Q87934)".

2. To determine whether the file is a Microsoft issue, access the "DLL Help Database", enter the file name -- including extension in the space provided, and then press Enter (correct spelling and punctuation is recommended). If a list is rendered, simply determine from what media is shown and that you currently have and extract a copy, "How to Extract Original Compressed Windows Files (Q129605)".

3. If the file cannot be determined from that site and you know your system requires it, it's usually advantageous to simple uninstall and reinstall the applicable program for which the file belongs. Search the "Google_Group" Web site for resources or ascertain from the vendor who released the program whether there was any mention of having to furnish a particular ".DLL" file from some other site before theirs work correctly.

Perhaps a corrective procedure:

Reinstall, or at the very least repair, the version of Internet Explorer mention above to see if the DLL situation is corrected. However, this file, issued by M$, covers numerous other programs as well. Be forewarned that whether the version you happen to get and install may or may not work for the given application which caused or is causing the anomaly to happen in the first place.

1. To use the Internet Explorer Repair tool, click Start, Settings, Control Panel, double-click the Add/Remove Programs icon, click Microsoft Internet Explorer ? and Internet Tools, click Change/Remove, and then click Repair Internet Explorer.

2. If the Repair tool detects an error, e.g.: "Internet Explorer cannot be repaired. Please reinstall Internet Explorer" or one similar, we recommended that Internet Explorer be reinstalled.

Note: "Description of the Internet Explorer Repair Tool (Q194177)": Please note this article references just about every version of Internet Explorer and Operating Systems, but the steps/procedures are not exact. As far as I've been able to ascertain, there is no specific article concerning Internet Explorer v6 except for Windows XP.

Warning: Read the description of the apparent problem should the Details button be provided when an error pops up. You might receive the following types of explanations:

? Internet Explorer cannot be repaired due to the following errors: "File name" is missing


? Internet Explorer cannot be repaired due to the following errors: "Version 4.72.3110.0 of file name exists but needs to be greater than 6.0.20x.xxxx"

Note:The version number listed for a file is the minimum version required by Internet Explorer. If no version number is associated with a file, the Repair tool verifies the existence of the file but not its version. In many, many, instances, you can save yourself some effort perhaps by ascertaining whether an updated copy of the required file is readily available and restore it to the system without having to reinstall. See if you already own a copy of some Microsoft media from which it can be extracted. Please read this article, "Definition and Explanation of a .DLL file." Afterwards, determine whether the x.DLL file was issued by MS and you have a copy, then extract it. Access the DLL Help Database, enter the file name -- including extension in the space provided, and then press Enter. A list of issued DLL files will be rendered if it is a Microsoft issue (correct spelling and punctuation is recommended). If found, determine whether you have the necessary media available, and "Extract Original Compressed Windows Files (Q129605)." Be advised however, this process isn't going to do you any good if the stated dll files are not on your computer or on the media you have. Whether they may be found and downloaded from some certain Web site, I do not know. If all else fails, then uninstall Internet Explorer and then reinstall.

3. Are files available in the Windows\VCM folder if an in-place Setup for Windows was run?

a. The article [Q186157] describes the Version Conflict Manager tool (Vcmui.exe) included in Windows 98. During the installation of a new program (including Windows 98), files on a hard disk may be detected and replaced with older versions. If a newer version of a file is detected by Windows 98 Setup, a version conflict occurs. When Windows 98 is installed, newer files replaced by Windows 98 Setup are automatically backed up for compatibility purposes only if there are any -- the way I would want mine. The Version Conflict Manager tool lists all the backup files, the dates they were backed up, the version number of the backed up files, and the version number of the file currently in use.

b. The article [Q184585] discuss that when Windows Setup detects that a file already exists on a system newer than the one being installed, Setup replaces and automatically moves it to the Windows\VCM folder. If the Version Conflict Manager tool is used later to restore a file which was newer than the file installed by Windows Setup, the older default file is then moved to the Windows\VCM folder with a .000 file extension.

Warning: However, if multiple (more than one) files are restored at once to the system, the newest versions are properly restored, but the files which Setup actually installed (the default file) are not moved (switched) to the Windows\VCM folder -- something we probably don't care about anyway. To prevent this from occurring, restore files one at a time.

4. Search for the file, "Fixie.inf" which should be in the folder, C:\Program Files\Internet Explorer. If it is missing and you can acquire a copy, this may fix the unable to repair anomaly.

5. There may be files named, "Fix IE Log.txt" or "IE Setup Log.txt" which may be searched down and read. Either or both of these file may give further clues of the anomaly cause.

6. Supplemental reading:

a. "Availability and Description of Internet Explorer 6 (Q293513)" and "How to Uninstall Internet Explorer 6 (Q293907)."

b. This Microsoft TechNet "appendix" provides detailed information for troubleshooting Microsoft

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