MDAC Uninstall, MDAC Reinstall, Fixing Damaged MDAC Install

MDAC Uninstall, MDAC Reinstall, Fixing Damaged MDAC Install

Post by gpt » Sat, 03 Dec 2005 01:18:42

We recently had a problem with a push install of MDAC 2.8 SP1 (latest
available version) to Windows 2000 Pro workstations, varying SP levels.
Some machines failed to install correctly. Component checker reported
MDAC 2.53 and attempts to reinstall 2.8 SP1 finished without actually
doing anything, apparently detecting that the same or newer version was
already installed. After some searching, we found references to four
registry keys that, when removed, would allow MDAC to be reinstalled.
I added the registry keys to a .reg file, placing a minus (-) at the
beginning of the line just inside the first bracket, an undocumented
switch that will delete entire keys. I ran the reg file, which did
delete the keys, and a subsequent reinstallation of MDAC 2.8 SP1 was

Here are the entire contents of the .reg file, between the lines of
Windows Registry Editor Version 5.00


Although I haven't tested this on other OS's, registry exports from XP
or Server 2003 also list Windows Registry Editor Version 5.00 at the
top of the file. I actually exported the existing keys to .reg files
and copied the line containing the key, the one with the square
brackets at either end.[...], to a new file, adding the minus, then ran
it on the other affected machines.

1. MDAC 2.8 diff. driver than latest MDAC security fix (MS03-033)

2. Should I install MDAC 2.6 or MDAC 2.8?


I have a Win2000 webserver accessing a SQL2000 server. I want to move the
SQL server from a Win2000 to a Win2003 server but when I do this I get
anonymous access problems.

The MDAC on the webserver is ver 2.5 (the one that comes with Win2000)
The MDAC that comes with SQL2000 is ver 2.6
The MDAC that comes with Win2003 is ver 2.8
all services packs etc are latest and greatest

I want to update the 2.5 version. Should I update to 2.6 or to 2.8? Are
there compatibility issues with some of the versions? Is there a possibility
that the website won't work properly with one of these versions?


3. Client MDAC 2.7 referencing Server MDAC 2.7???

4. MDAC 2.5, updating to MDAC 2.7

5. MDAC 2.6 -> MDAC 2.7

6. MDAC or not to MDAC?

7. MDAC 2.8 vs MDAC 2.7 SQL Server Driver - causing deadlocks

8. MDAC 2.1 / MDAC 2.53

9. MDAC 2.8 seems cause SQL backup fail, can anyone send us a MDAC 2.8 latest hotfix ?

10. Reverting to MDAC 2.6 from MDAC 2.7

11. MDAC 2.7 and MDAC 2.8 release file problem

12. Question: MDAC 2.6 RTM to MDAC 2.5

13. New mdac old mdac?


15. MDAC 2.7 and MDAC 2.8 problem