Error “the Windows Installer Service Could Not Be Accessed” In Windows Vista

© Ramesh Srinivasan | Windows Vista | 20th March 2008

When you try to install a program which uses Windows Installer in a Windows Vista computer, you may receive the following error.

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.

This error may occur even though Windows is already in normal mode.

Resolution

Start the Windows Installer service

  1. Click Start, type Services.msc and press {ENTER}
  2. Double-click Windows Installer
  3. Set the Startup type of Windows Installer to Manual
  4. Click Start to start the service. Note down the error message if any.
  5. Click OK.

Windows Installer Registry Fix

If the above steps do not help or if the Windows Installer service is not listed in the Services applet, follow these steps:

  1. Download msiserver.zip and save it to Desktop.
  2. Unzip the file and extract msiserver.reg to the Desktop.
  3. Right-click msiserver.reg and choose Merge.
  4. Click Yes when asked for confirmation.
  5. Restart Windows.

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72 Comments

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  1. saju
    said this on Friday, June 25th 2010 10:16 pm

    Thanx a lot………….

  2. Jorge
    said this on Wednesday, June 23rd 2010 5:21 am

    No, didn’t work for me the 2 solutions . Still having the same error on vista.

  3. jggy
    said this on Thursday, June 17th 2010 9:55 pm

    thank you so much guys.. i was unable to uninstall..

  4. allen
    said this on Monday, May 24th 2010 8:37 pm

    Thank you.

    First website from many who helped me solved problem.

    Thanx again.

  5. Parke
    said this on Sunday, May 9th 2010 4:54 am

    Thank you! This solved my problem! :D

  6. John
    said this on Saturday, April 24th 2010 6:28 pm

    sorry…did what you said and still not worked for my windows 7
    when i try to download itunes.

  7. shlomi
    said this on Friday, April 23rd 2010 3:40 pm

    i had the same problem on windows 7 ultimate and not working for me i try the steps

  8. Michael Chevalier
    said this on Thursday, April 22nd 2010 3:26 am

    Thanks, I too used this remedy in my Windows 7 64bit Ultimate.

  9. Paul
    said this on Friday, April 16th 2010 7:17 pm

    No, didn’t work for me. Still having the same error on vista.

  10. govind
    said this on Saturday, March 20th 2010 9:38 pm

    thanks a lot t workied with win 7

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