"The windows installer service could not be accessed"

Discussion in 'Windows 7 Help and Support' started by mattinsa, Mar 10, 2010.

  1. mattinsa

    mattinsa New Member

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    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
     
  2. cybercore

    cybercore New Member

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    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.
     
  3. mattinsa

    mattinsa New Member

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    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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