Application could not start because of an error connecting to its database

We I started my Windows 7 computer and logged on this morning a pop-up appeared with the message “Application could not start because of an error connecting to its database”. Windows 7 update installed an update for Microsoft Security Essentials yesterday, maybe it conflicts with Comodo.

CIS should normally not be in the way of Windows Updates

What happens when you run Windows Update again?

Did the message tell what program was affected?

If you run MSE, which is an antivirus, with CAV clearly you can have conficts between the 2 AV resulting in instability of your system.

Uninstalled Microsoft Security Essentials and Comodo Anti-virus and then reinstalled Comodo Internet Security.
Comodo seems to be working now.

I started getting the same error message last night:
“Application could not start because of an error connecting to its database.”

I repeatedly uninstalled/reinstalled CAV so it is the latest version as of yesterday. The error is still there.

I can run scans, but only manually, but there is no automatic protection. A manual scan ran all night and would not allow me to log back on in the morning.

I am running Win Vista. No other antivirus , including MSE, is running or even installed.

My PC is sitting here totally defenseless. If I cannot repair this tonight, I will have to find another AV.

That doesn’t sound like an error message I know, can you please post a screenshot of it?
Can you also verify the CIS event log to see if it records more details? you can open it by going to ‘antivirus, view antivirus events, more’ and it will open the viewer.
Now please verify the ‘Tasks launched’.

Also have a look at the windows event viewer to see if the application & system logs record more details.

LOL - You don’t believe the error exists? The image won’t help much. I’ve attached an image.

CIS event log: I can’t run the program, so I can’t view antivirus events. I don’t see a file that I can identify as any kind of log in the folders. Everything was deleted when it was uninstalled and it hasn’t run since, so I wouldn’t expect there to be any logs except for an installation log. And, of course, no tasks were launched except for the scans I initiated by running cavscan.exe.

I don’t see anything in the Event Viewer for that time frame except “Logon” for cmdagent.exe. There are “Process Creation” and “Process Termination” for cfp.exe for early this morning.

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Please don’t get me wrong, I’m not comodo staff so I don’t know all the error’s they have coded in there…
I’m just a volunteer trying to help, was just saying that I have never seen this one before.

CIS event log: I can't run the program, so I can't view antivirus events. I don't see a file that I can identify as any kind of log in the folders. Everything was deleted when it was uninstalled and it hasn't run since, so I wouldn't expect there to be any logs except for an installation log. And, of course, no tasks were launched except for the scans I initiated by running cavscan.exe.

I don’t see anything in the Event Viewer for that time frame except “Logon” for cmdagent.exe. There are “Process Creation” and “Process Termination” for cfp.exe for early this morning.


Looks like your install went bad, I think it needs an uninstall then a verification clean-up of leftovers and then a fresh install.
What could have happened is that MSE has flagged a critical CIS file as malicious and crippled CIS by moving it to quarantine.

Thanks for the suggestion, but I’ve been through the uninstall/reinstall routine several times already.

Now it is uninstalled and will stay uninstalled. I’ve switched to Avast! and the PC is running faster than it ever did with Comodo, and on the initial scan it found hidden trojans Comodo had been missing.

Thanks anyway.

Do you still have the samples or at least the names of these trojans, maybe they prevented CIS to start?