How to Repair MDAC
Step 1: Use the macropool MDAC Repair Tool
Our MDAC Repair Tool performs an analysis of the MDAC system components,
suggests any missing updates, and repairs MDAC in most cases. See the
demonstration with screenshots.
MDAC Analysis and Repair Tool
(This is not freeware!!! Please read the
(Download - 333 KB)
Step 2: Restart Windows
Restart Windows. If the problem persists, proceed with step
Step 3: Install MDAC and JET
Even if the repair tool did not suggest it,
download and install MDAC and Jet. If
still no luck, proceed with step 4.
Step 4: Check MDAC files
Note: The following steps are not
applicable under Windows XP with Service Pack 2. When using Windows XP SP2, proceed as described
Microsoft offers the tool MDAC Component Checker, which
you can use to verify the consistency of your MDAC installation.
Download MDAC Component Checker
After the download has finished, run
the file cc_pkg.exe to uncompress the files into the folder
- Select the first option, and then click OK.
- After a short analysis, you will see a report with helpful
information. In particular, the MISMATCH section (see illustration
below) indicates potential problems with your MDAC installation:
- Select the MISMATCH item. In the right pane, you can
see the MDAC files that should be present in a different version
on your computer. (The Component Checker compares the installed
file versions with a list of versions that were delivered with
The Mismatch Field column shows which version
is expected for each file. The File Version column shows
the actual installed version of each file.
- Since a regular installation of MDAC does not seem to help
to resolve the mismatched file versions, you must manually copy
the concerned files to the listed locations. Unpack the file
mdacxpak.cab out of the package MDAC_TYP.exe in
a temporary folder with WinZip.
- The file mdacxpak.cab can be unpacked with WinZip once
more. It contains the most important MDAC files. Copy all these
files to the folder as stated in the Path column.