Painfully slow CIS Scanning

I am unclear why my CIS scans so slowly. My current scan is in its 27th hour. Between 18 and 30 hours seems typical. Is there a setting I need to adjust? My PC has resources to spare, so I cant imagine that is the problem.

Also, CIS has never, as far as I recall, found any issues, which concerns me.

Comments/suggestions to help me get the most out of my Comodo products will be appreciated.


Welcome. :slight_smile:

There is normally no set or typical range as to how long a scan should take. It depends on the PC specs and how many files are stored on the area being scanned. Still, 27 hours seems too long. How much is being scanned (or in other words, how much hard drive space have you used)? Also, make sure in ‘Antivirus’ > ‘Scanner Settings’ > ‘Manual Scanning’ (or ‘Scheduled Scanning’ if it’s a scheduled scan), make sure the ‘Do not scan files lager than’ option is set to the recommended 20mb.

27 hours is way too long. I can do a complete scan of everything on my system in about 40 minutes. There has to be something drastically wrong with the installation.

Is it actively scanning the whole time, or is it in fact stuck? Looking at the scanning window, is it sitting on a single file or is it scrolling through file names? I suspect it has probably locked up.

I overestimated my scan time.

It was about 42 minutes with 3.9 so scanning is much faster in 3.10

Do you have items on your exclusion list? Exclusions are actually not scanned now, which improves scan time.

Nothing is on the exclusions list except the defaults

The funny thing is this is oh so typical of all scans. To answer your questions, in my 30th hour I was on file 9410. So I guess it was stuck for a while. It must always be. It makes me wonder if the scans have ever been effective in any way. In a year, I only have one quarantined item, and it was for my pinnacle program! Makes me really doubt Comodo, or atleast the version on my PC.

My hd is 120GB of which 90gb+ is unused. My scans are for ‘critical areas’, which should limit my used hd considerably.

My gut tells me to uninstall and reinstall as a last gasp effort to use Comodo. Any additional suggestions? I just want a reliable Internet security/antivirus, and thus far Comodo is not it.

Comments will be appreciated.


What version are you currently running? The latest version is 3.10.102363.531. You can view your version in the Miscellaneous > About dialogue box. If you do not have the latest version, please uninstall and reinstall to the latest version here.

I neglected to mention, my version is 3.10.102363.531. Scanner exclusions only Comodo.

Need an honest opinion; is Comodo good as additional protection to say, McAfee, Norton, ZA etc or is it OK used by itself the way I am using it? Based on my scanning, should I put the word used in quotations… :-\

Well, the AV is still young. It tends to get a lot of false positives at the moment.

However, I’ve been running CIS as my main security solution for about 5 months now. I do use Avast, Avira, SUPERAntispyware, and Malwarebytes to run on demand scans a couple times a week. (Not all of them, I run two of them, then rotate the next week) So far I have yet to see anything that makes me think CIS isn’t capable of keeping my computer clean all by itself. All the other applications ever find are cookies.

I have no experience with McAfee, but I feel that CIS is superior to Norton and ZA even with such a young AV.

What OS are you on? Do you have other security programs running in the background? If so try temporarily disabling them.

Do you have DEP enabled in Windows? Try setting it only to essential Windows services and programs. DEP can be found here: click right on My Computer → Properties → Advanced → Performance → Data execution prevention.

We are gonna take a look to see if there are some old drivers of your previous security programs are still around. Go to Device Manager → View → show hidden devices → now look under Non Plug and Play drivers → when you see a driver that belongs to your previous security programs click right → uninstall —> do this for all drivers → reboot your computer.

When the problem persists make sure there are noauto starts from your previous security programs download Autoruns and run it.

This program finds about all auto starts in Windows. This tool can therefore seriously damage Windows when not handled properly. After starting go to Options and choose to hide Windows and Microsoft entries and then push F5 to refresh.

Now check all entries to see if there are references to your previous security program. When you find them untick them. After unticking reboot your computer and see what happens.

I discovered my scan is hanging up on the same file every time: ahead\DSfilter\netdiscmanager. Not sure what this file is and how to exclude this from a future scan.

??? Oppy

Enter the bold type into your run box … Start > Run > regsvr32 "C:\Program Files\Common Files\Ahead\DSFilter\ Run your scan again … if it hangs like a ■■■■ uninstall Nero and reinstall Nero … do you really need Nero …