Can't remove old copy and reinstall new one due to error message

I recently reformatted my Windows 7 Home Basic ed with existing Comodo Internet Security Premium. I chose the method wherein it does not require deleting my existing files and programs. i’ve done this 3 times already and not one single file and program was noticably affected. However, this time when i accessed the Comodo program i noticed that i does not normally start and i cannot scan normally with it but it shows in the Comodo control panel it is working fine.
I tried uninstalling/upgradding it with the normal ways through control panel uninstallation.
Error message pops up "Cannot access network location".
Tried installing new copy from Comodo website.
Same error message pops up.
Please help!!! Thanks.

What existing files ?

Is this a new (to me) method of formatting that preserves files ?

Is this an over-write/update method of installing Comodo which was never expected to create all the files that have not been changed, and would probably NOT leave you with a functional Comodo unless it has the old version as a basis ?


Hi Alan,
Thanks for the response. Let me clear it up further. I meant that i reformatted/re-installed my Windows 7 with the given option to overwrite the existing OS without having my existing files and programs being removed. If still unclear you can verify with Microsoft website. My problem with the Comodo is that when i did this with my Windows, when i tried opening up the existing Comodo it is not operating as well as before (the Virus scanner and update shows an error).
When i tried to remove and reinstall the Comodo it comes up with the error message “Cannot access network location” and i cannopt proceed further.

Thanks for your thoughts.

“If still unclear you can verify with Microsoft website” does not work for me.
You need to give a link to an exact point on that gargantuan monster.

I have Google searched and always see advice to backup files/programs before installing Windows.
Backups are also advised for updates/upgrades.

In fact I always hold off any Patch Tuesday etc security patches until I have a partition image to restore normality after any of the disasters for which they are renowned. A zero day malware threat is less danger than a patch that has not achieved a week free of BSODs for the “early adopters”.

My first P.C. used DOS 3.32 or there abouts.

I think I remember a DEBUG that could examine and modify files in Hex,
and could Go or Jump to transfer execution to whatever was designated.

I learnt of a magic number in BIOS that would FORMAT the hard drive,
spewing onto each track a solid sequence of data sectors and sector identity markers.
It was possible to specify how many sectors per track and how much data per sector.

No files ever survived a format ! ! !

Even converting a partition from FAT32 to NTFS is supposed to preserve files
but it is considered prudent to make a backup first.

I suspect that what you call reformat might be termed Update or Upgrade.

I strongly suspect that any Microsoft promise to preserve files and programs during a Windows 7 Upgrade or Update will apply to contents of your %USERPROFILE% and other files and folders that are of no interest,
BUT WINDOWS\SYSTEM32 is another matter.
Any Comodo executables that are held there may be “terminated with extreme prejudice”,
and any servcies that launch CMDAGENT.exe etc would be removed,
and possibly all the Comodo registry keys,
and this could render Comodo defective, and even unable to remove itself.

Perhaps you need to use a Comodo cleanup tool.


Again thanks alan for the additional info.
Could you pinpoint me to which particular program i will need? Comodo System Cleaner or CIS Clean-up Tool? And lastly the proper way to do it?

Thanks a lot!!

Comodo System Cleaner is a general purpose “jack of all trades” that purges junk left behind when applications are removed.
It is not designed specifically to remove Comodo, but it may do a good job - especially if one group of Comodo designers talk to another group ! !

CSC may do a good job at removing CIS remnants,
but with any vigorous cleaner there is a risk that vital things needed by other applications will get thrown out with the baby’s bathwater.

For my own safety against any disaster, I would allow CSC to scan for junk, but only remove those items that clearly belong to Comodo.

I advise the CIS CLEANUP TOOL. Look at
The latest tool is at the bottom of the first post.

I posted many replies, and my reply #31 includes ZapBeta which shows exactly what was deleted but did not go due to permissions issues.
I believe all scripts work well on XP.

Unfortunately Windows 7 has broken CMD.EXE due to incompetent use of JUNCTIONS.
When a junction is deleted the entire destination is erased, and when they realised their folly instead of fixing it they did a typical bodgy Microsoft work around - they published a note warning of this “feature” and giving advice upon how to use CACLS to protect from accidental deletion.

Unfortunately Windows 7 appears to have applied some such bodge to the junctions intended for compatibility with XP, and I find that permissions restrictions at the junctions limit what can be done through them, and many DOS commands are not allowed to happen.
e.g. an item can be deleted, but CACLS is not even allowed access to tell me anything about it,
and “IF EXIST %item% (echo success) else (echo failure)” will always say FAILURE because it DOS not allowed to test its existence.

I have only acquired Windows 7 this week, and believe my script should still be effective for the registry.
I think my script, and all the others, may still be effective at deleting designated files when Windows permits their deletion, but Windows 7 tells me nothing but lies when I try to test whether they survived the deletion attempt.

I am now reworking my script to avoid the XP paths that Win 7 diverts with junctions, and using correct Win 7 paths which I need to test before release.


I forgot to say, use RevoUninstaller to remove Comodo. It uses the facility provided through Add/Remove by Comodo and observes what happens, and then when Add/Remove has finished, RevoUninstaller has a good idea of what else might need zapping.

There are many useful suggestions for you on the 7 page topic


A million thanks alan. Helped me a lot. :smiley:

Pleased to be able to help