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Windows 7: Windows Installer Service cannot be accessed.

01 Sep 2013   #1
Raf Akiya

Windows 7 64 bit home premium sp1
 
 
Windows Installer Service cannot be accessed.

Okay, so i was trying to install .Net Framework 4.5, when all of a sudden, it rolls back the download, and displays a message "Installation did not succeed, .Net Framework has not been installed because: The Windows Installer Service could not have been accessed. This can occur if the Windows Installer is not correctly installed."

I've tried numerous workarounds, this includes restarting the Windows Installer service and SFC repair. I checked out the services.msc and the Windows Installer is running and everything seems fine. but still i cant install .Net Framework 4.5, or any .msi packages for that matter.

can anyone help me out??


My System SpecsSystem Spec
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02 Sep 2013   #2
A Guy

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium x64 SP1
 
 

Welcome to Seven Forums Raf Akiya. See if the 2nd step on this article helps you ( it applies to Windows 7 as well)

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

This was referenced in the answer on this thread, which has more suggestions as well

"The Windows Installer Service could not be accessed. This can - Microsoft Community

A Guy
My System SpecsSystem Spec
02 Sep 2013   #3
Raf Akiya

Windows 7 64 bit home premium sp1
 
 

I have tried both of the solution provided there. still nothing works. I think something is blocking the Windows Installer from installing update files or .msi files... ive also tried Fixit, and i cant seem to open it and has a runtime error 80070005.

i suspect its a virus wreaking havoc on my system. so i used MalwareBytes to seek n destroy. it removes several viruses from my system but did not resolved the issue.

got any more suggestions for me?? :/
My System SpecsSystem Spec
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02 Sep 2013   #4
A Guy

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium x64 SP1
 
 

Well, if you are infected, you must clear that up first! Suggest you scan with several different programs. Virus can wreak havoc with registry and settings, and sometimes only a clean install can fix things.

SUPERAntiSpyware | Remove Malware | Remove Spyware - AntiMalware, AntiSpyware, AntiAdware!

Windows Defender Offline

Any good bootable AV scanners

Comprehensive List of 26 Bootable Antivirus Rescue CDs for Offline Scanning

A Guy
My System SpecsSystem Spec
02 Sep 2013   #5
Raf Akiya

Windows 7 64 bit home premium sp1
 
 

I fully scanned my systems with Windows Defender Offline and removed 2 potentially unwanted threats. But the issue still exist..

do i need to run more bootable av programs just to makesure it is all gone?
My System SpecsSystem Spec
02 Sep 2013   #6
A Guy

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium x64 SP1
 
 

It would be a good idea, I'd scan until I was sure there is no infection. Repairing the damage done will be harder.

You might also scan with ADWCleaner

Choose Download Now @BleepingComputer link

AdwCleaner Download

How To Use AdwCleaner [Manual] | malwareremovalguides

A Guy
My System SpecsSystem Spec
02 Sep 2013   #7
Raf Akiya

Windows 7 64 bit home premium sp1
 
 

Everything seems to checked out okay. its just there is still something blocking the windows installer for some reason. Maybe it has something to do with the registry?

or maybe the installer itself malfunctioned?
My System SpecsSystem Spec
02 Sep 2013   #8
A Guy

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium x64 SP1
 
 

My System SpecsSystem Spec
02 Sep 2013   #9
andrew129260

Windows 10 Pro
 
 

In addition to what was suggested by A GUY, if that fails......

Try this:
Services - Restore Default Services in Windows 7

Download the windows installer option. Open the reg file-click yes and merge it. Restart.
See if the issue is now solved.

I also suggest you to post a new thread here to make sure you are clean from threats completely. That is not something you want to guess on!

EDIT:
Just noticed that was method 4 to re-add the service. Sorry about that.
My System SpecsSystem Spec
02 Sep 2013   #10
Raf Akiya

Windows 7 64 bit home premium sp1
 
 

I tried Method 3 on that site, but the boxes have been greyed out as shown on the screenshot below



maybe this has something to do with it??
My System SpecsSystem Spec
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 Windows Installer Service cannot be accessed.




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