Windows 7 Forums

Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: Failed to connect to System Event Notification Service

05 Sep 2012   #1

Windows 7 Pro x64 Sp1
Failed to connect to System Event Notification Service

This Error popped up on my Screen today

My Nvidia control panel, among other programs do not seem to start with windows any more ( i noticed this right away because my screen configuration had changed)
I have checked the service and all of its dependencies and all of them are working fine. a quick Google search yielded no fixes that worked for me and I'm stumped as how to solve this

Thanks In Advance


My System SpecsSystem Spec
05 Sep 2012   #2

Windows 10 Pro x64

Usually it's a driver or COM component that's causing this. What does your Application and System event log show you as warnings or errors?
My System SpecsSystem Spec
05 Sep 2012   #3

Windows 7 Pro x64 Sp1

this is a freshly installed copy of windows, its only three days old. I installed all of the drivers from the manufacturer website, I have only installed Steam, iTunes, Avast, and origin.
This exact problem is sorta what pushed me to reload my system, that and it was getting sluggish. All my personal files and games are on a separate drive and a reinstall is not a big issue for me.
Below are the errors that i could find that have occurred since this error has popped up again, enjoy.

Errors That Occurs During or Shortly After start up

-Event filter with query "SELECT * FROM __InstanceModificationEvent WITHIN 60 WHERE TargetInstance ISA "Win32_Processor" AND TargetInstance.LoadPercentage > 99" could not be reactivated in namespace "//./root/CIMV2" because of error 0x80041003. Events cannot be delivered through this filter until the problem is corrected.

-The Windows Audio service hung on starting.

-The server {DCAB0989-1301-4319-BE5F-ADE89F88581C} did not register with DCOM within the required timeout.

This is a logged warning That occurs multiple times during startup

-The winlogon notification subscriber <GPClient> was unavailable to handle a critical notification event.

Nvidia Control Panel Error that logs Whenever i try to open it

-Faulting application name: nvcplui.exe, version: 4.4.730.0, time stamp: 0x4fb21569
Faulting module name: NVCPL.DLL, version:, time stamp: 0x4fb20590
Exception code: 0xc0000005
Fault offset: 0x0000000000059f17
Faulting process id: 0x1300
Faulting application start time: 0x01cd8be6a4fca74a
Faulting application path: C:\Program Files\NVIDIA Corporation\Control Panel Client\nvcplui.exe
Faulting module path: C:\Windows\system32\NVCPL.DLL
Report Id: 2b38b8f9-f7da-11e1-bf6c-0008ca272610

I am going to uninstall a couple of programs and reinstall some drivers, i hope its not hardware related because the system was just built a month ago

Thanks Again
My System SpecsSystem Spec

07 Sep 2012   #4

Windows 10 Pro x64

The WMI error has been around since Vista, and is an easy fix:

The second error, the DCOM error (DCAB0989-1301-4319-BE5F-ADE89F88581C) is an NVidia service, so that would be driver related.

Given the other errors here, I'd install Windows but *don't install anything else* and see what sticks. I see you've got an NVidia video card, and the drivers for it are at least very possibly the root of your problems. Windows Update may install something (or Windows itself) during install, but don't attach it to a network or the internet if you reinstall, and see what you get there (keep WU from touching it during installation). Then, you can (one thing at a time, with at least 2 reboots between each component) layer things on. My money's still on the NVidia drivers though.
My System SpecsSystem Spec
07 Sep 2012   #5

Windows 7 Pro x64 Sp1

ill work on reinstalling windows this weekend, and as you suggest slowly reinstall drivers and programs. ill post my results when and if this error graces me with its presence again

Thanks for the help
My System SpecsSystem Spec
07 Sep 2012   #6

MS Windows 7 Ultimate SP1 64-bit

Q1. is this a custom build? Yes/No.
Q2. Is SP1 (service pack #1) installed? Yes/No.
Q3. Do you have a Win 7 DVD? Yes/No
Q4. The source of your Win 7 is _____________________?

Provide 4 answers.

You made a decent start on your system specs. This will enable you to thoroughly fill out your system specs:
Update your SevenForums System Specs
User CP (located on the top menu bar) |
Your Profile | Edit System Spec
(left-hand column)

To gather info, use Speccy (my favorite) or SIW or System Info

In the System Manufacturer Block, enter:
Ø Manufacturer and Model OR Custom build.
Ø ADD the word laptop, desktop, netbook or tablet.
For example:
Toshiba Satellite L305D notebook.

Provide full windows version info, for example:
MS Windows 7 Ultimate SP1 64-bit

Use the “Other Info” block for Optical Reader,
Mouse, touchpad, wifi adapter, speakers, monitor, etc

Scroll down and click on SAVE CHANGES.

With Speccy, you can select with your mouse/touchpad info from the display
and paste that info into your specs.

SIW is a marvelous program, but the free version does not offer
this capability.
My System SpecsSystem Spec
07 Sep 2012   #7

Windows 7 Pro x64 Sp1

Quote   Quote: Originally Posted by karlsnooks View Post
Q1. is this a custom build? Yes/No.
Q2. Is SP1 (service pack #1) installed? Yes/No.
Q3. Do you have a Win 7 DVD? Yes/No
Q4. The source of your Win 7 is _____________________?
To answer your questions :
1. Yes
2. Yes
3. Yes, with SP1 on Disc
4. (if you mean, is it a legitimate copy) Yes, procured from

i have also added some more info to my system specs, i am at work right now and can't remember all of the details

this system ran for a few months with no issues, ran beautifully. destroyed every game i played across three screens. then all of the sudden that error popped up, nothing else changed, no new drivers or programs

this is why it has me stumped, I fell into a technician job at my local computer store and have seen a lot of strange stuff over the last year, but the fact that this showed up after a fresh install makes me wonder if its related to windows updates or failing hardware. ill continue with the windows reinstall this weekend and try to see when the error occurs

I'll keep you guys posted if i find out what the problem is/was
My System SpecsSystem Spec
07 Sep 2012   #8

MS Windows 7 Ultimate SP1 64-bit

all answers good.

I have more questions, etc. but they can only be performed on your desktop.
My System SpecsSystem Spec
07 Sep 2012   #9

Windows 7 Pro x64 Sp1

So found out that my nvidia drivers wont uninstall properly, strange because i had been using these exact drivers from the beginning without any issue until this started

I am getting ready to reinstall windows, just downloading drivers for reinstall. if you want to ask any more questions now is the time
My System SpecsSystem Spec
07 Sep 2012   #10

MS Windows 7 Ultimate SP1 64-bit

Why are you downloading any drivers? The only driver you might need to have on hand is for a WiFI or Ethernet connection, just in case, the Win 7 default driver doesn't do the job.

Remember: The installing of drivers started you into problems.

Win 7 is very smart. Install Win 7, then-without downloading and installing drivers-carry out the following:UPDATING YOUR WIN 7
Change settings (left-hand column) |
checkmark all four of the boxes | OK

Approve any dialog boxes presented. Let Windows install any update features.

WIN is the key with the Microsoft flag on top.

Check for Updates
(left-hand column)
Install ALL critical updates.
Restart your computer (even if not prompted)

Repeat this procedure until there are no more critical updates.

DO NOT TRUST the “Windows is up to date” in center of dialog. until you see that TWICE IN A ROW!

Use the “critical update” procedure until all important updates are installed.

Under Optional updates you will be presented with:
a) Microsoft Bing Desktop which is of questionable value
b) a list of about 34 language updates.

You can hide those updates so that aren't continually notified of those updates.
When you click on 34+ optional updates are available, then you
a) highlight all of the language updates,
b) right-click anywhere in the highlighted list.
c) click on Hide Updates,
d) OK button.
Install ALL other Optional Updates.
Use the “critical update” procedure.


Install ALL, yes, ALL updates.
This is Win 7 and not Vista or XP (eXPired).

Hung is very doubtful unless you interrupted updates.

CTRL + SHIFT + ESC key combo will pop-up the Task Manager.
Lo and behold, Windows Update is still running!

You hold down the CTRL and SHIFT keys.
While holding them down, tap the ESC key once.
My System SpecsSystem Spec

 Failed to connect to System Event Notification Service

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar help and support threads
Thread Forum
Having issues with Aero and a System Event Notification Service Error
Hi guys, Everytime I start my computer, it starts in the Windows Classic theme, with Aero disabled, and unable to be turned back on. In addition to this there is a pop-up that says "Failed to connect to a Windows Service" "System Event Notification Service" The Aero issue can be...
General Discussion
Windows could not connect to the system event notification service
So recently I had hardware issues, and through warranty I had several replacements done. Mobo, Video cards, ram sticks, and the power supply. After all that was fixed and replaced my computer seemed to have ran fine for a few days, and it still technically is except for this problem. The...
General Discussion
Could not connect to the System Event Notification Service
I have tried each and every one of the solutions on the forums and over here. All my drivers are up to date (double checked), I rolled back and uninstalled all updates, Did sfc /scannow three times and they passed without any integrity violations. I've tried netsh winsock reset as well. The aero is...
Installation & Setup
Windows could not connect to the system event notification service
Hi i have a couple of users on our network who are receiving the following error on startup "Windows could not connect to the system event notification service service. Please contact your system administrator" When this error is receive i always notice the startup time take an extra 2-4 minutes...
BSOD Help and Support
Windows failed to conect to " system event notification service"
My computer recently started having issues........ here is what is going on: * boot computer * Windows boot screen displayed ~ 1 minute * screen goes black. Can move mouse. Drive light constantly on, not blinking. ~ 5 minutes * log in screen comes up / log in * Desktop loads ~ 1 minute >...
BSOD Help and Support
System event notification service error!!!
hi! I am using win 7 home basic edition. There was a power failure and could not shut down the system. when i started the system it gave me this error. Windows could not connect to the System Event Notification Service service. This problem prevents limited users from logging on to the...
General Discussion

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

© Designer Media Ltd

All times are GMT -5. The time now is 17:09.

Twitter Facebook Google+

Windows 7 Forums

Seven Forums Android App Seven Forums IOS App