Posted by: evtechie | January 14, 2009

Windows Installer Problems

Recent issue with a client’s machine had us on the edge of our seats. The installer service on Windows is necessary for installing software applications and runs automatically. My client’s machine, at every effort to install software or critical Windows Updates, stated:

” The Windows Installer Service could not be accessed. This can occur if you are running Windows in safe mode, or if the windows istaller is not correctly installed.”

Fun Fun… Needless to say, one of my first stops when I am stumped is the tech forums. I peruse the wisdom of dozens of brilliant men and women who find magic solutions to the plethora of Windows issues that peek their ugly heads out at the worst time.

The solution came form TaurArian [MS-MVP] on the Aussie Forums
http://phorums.com.au/archive/index.php/t-147728.html

The installer services must be unregistered and then re-registered.
This procedure corrects most situations, and does not affect any currently-installed programs that use the Windows Installer.

To unregister and re-register Windows Installer:

  1. Click Start, and then click Run.
  2. Type in the Open box:        msiexec /unregister   and then click OK.
  3. Click Start, and then click Run.
  4. Type in the Open box:     msiexec /regserver   click OK.
  5. Type commands exactly, including the space between c and /.

This will not affect programs which use Windows Installer that are already installed.

How to resolve Common “Windows Installer” Problems
http://support.microsoft.com/default.aspx?scid=kb;[LN];555175

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