Error "The Windows Installer Service could not be accessed" in Windows Vista

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

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

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

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

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72 Comments

Anonymous

said this on Tuesday, December 29th 2009 11:00 am

I LOVE THIS SITE!!!! Thankyouthankyouthankyouthankyou. I must post to express my GRATITUDE.
evilhugbear

said this on Tuesday, December 29th 2009 10:30 am

Thanks! The registry key worked in Win7 x64
mas

said this on Monday, December 28th 2009 7:46 am

Hey Mrarun I really don’t know what to call you!!!
the link you have given is a the most complete sorce of knowledge how to solve installer problem,there are five tricks.
fortunatly the forth one solved the problem.

thank you my friend.you survived me.
ron

said this on Sunday, December 13th 2009 9:26 pm

same complaint with error messagesnamely oy80070643
sankar

said this on Friday, December 11th 2009 7:00 pm

this still hasn’t solved my problem
Jared

said this on Tuesday, December 8th 2009 2:54 pm

Thank you so much this was very helpful. I have been trying to fix this for about an entire year.
Lauren

said this on Friday, December 4th 2009 10:43 am

THANK YOU SO MUCH! I’ve been trying to figure it out for a while now, and this worked! This whole thing was because of a program called Fix-It from Avanquest, it messed up my computer so much =/
Furr

said this on Friday, December 4th 2009 8:24 am

Didn’t help at all.
bhadra

said this on Sunday, November 22nd 2009 12:32 am

i have done every thing u said but it is still not working”windows installer ” .. pls help me ….
Lken

said this on Wednesday, November 11th 2009 4:12 am

This still hasn’t solved my problem .
I right click msiserver.reg, pick merge, then it says “Error accessing registry.”
What should I do?