📎 AI Summary:
The thread discusses a Windows 7 user experiencing errors related to the Windows Installer service after automatic updates, which have caused issues opening MS Office and Adobe programs. Despite attempts to resolve the problem via system restore and reinstalling updates, the error persists, and the user is hesitant to perform a reformat. Another user suggests running specific command-line fixes to unregister and re-register the Windows Installer, but these steps did not resolve the issue for the original poster.
mattinsa

mattinsa

New Member
Joined
Jul 2, 2009
Messages
28
Thread Author #1
Hi Guys,

There were a batch of updates done on my windows 7 machine this morning, I by mistake thought the updates had jammed (my machine often jams when I shut it down) so I held down power and rebooted.

I am now having serious issues when I seem to run MS Office & Adobe programs.

When I click them to open (via a file/taskbar/start menu) I get the following errror:

"The windows installer service could not be accessed. This can occur if the windows installer is not correctly installed. Contact your support personnel for assistance."

I first looked at system restore, but I only had 1 restore point and it was for the past hour which was past the time I performed the updates, if I try manually uninstall each update 1 by 1 I get the same error message above.

I have not found MS articles on remedies for this on Windows 7, but for XP etc MS do have a lot of information, I have followed these steps to try resolve - with no luck:

"Windows Installer Service could not be accessed" error message when installing application

BTW I have also tried to install windows installer 4.5 redistributable but its not compatible with win 7, I cannot find a download for windows installed 5.0 of which there is mention...

I am really not keen on doing a reformat, can anyone help me with ways to fix this issue?


Thanks,

Matt
 

Solution
cybercore
Did you try exactly these steps:

(under an administrator account)

1. Click Start, and then click Run.
2. In the Open box, type cmd, and then click OK.
2. At the command prompt, type msiexec.exe /unregister, and then press ENTER.
4. Type msiexec /regserver, and then press ENTER.
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cybercore

cybercore

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Joined
Jul 7, 2009
Messages
15,626
#2
Did you try exactly these steps:

(under an administrator account)

1. Click Start, and then click Run.
2. In the Open box, type cmd, and then click OK.
2. At the command prompt, type msiexec.exe /unregister, and then press ENTER.
4. Type msiexec /regserver, and then press ENTER.
 

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Solution
mattinsa

mattinsa

New Member
Joined
Jul 2, 2009
Messages
28
Thread Author #3
hi, thanks - yes I did.

Once complete, I close cmd and try click on the word icon pinned to my taskbar and the same error comes up...
 

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