Installing Comodo Internet Security gives Error:1603

Asked By 40 points N/A Posted on -

I use Comodo Internet Security, I recently uninstalled it to do a fresh installation but I got this error instead “Unable to install Comodo Internet Security, Error 1603. Unrecoverable error during installation" I do not know what to do next and I am thinking of reinstalling Windows. Any ideas how to solve this?

Answered By 0 points N/A #198108

Installing Comodo Internet Security gives Error:1603


Hi Mark,

Here are some instructions for how to do this:

1. Disable Sandbox/Defense (Right Click CIS Icon >Sandbox/Defense + Security Level > Disable )

*This will allow the tool to disable and remove CIS and other protected/safe applications without interruption*
2. Download the application.
3. Run the application (as an administrator).
4. Select the product you wish to uninstall/remove.

Link: Google Sites (Hosting v0.3b)
File Name:
Size: 5,075,834 (5.0 MB)
SHA1: CCA2EA280790C43E1098D0604311DB4A027F00A0
MD5: 33B0932C8C9BF6BDE0B3544DFB98AA7D

Change Log:


Fixed the problem of not running under Windows 7/Vista
Improved Dragon Script
Improved CIS Script for the new version
Improved CSC Script
Added CPM Script


Added support for legacy applications (LivePCSupport, CVA, Memory Firewall, Cloud Scanner)
Changed Portable – no more installations
Added Comodo Unity
Improved CIS Script


Fixed Shortcuts in Start Menu
Improved start up time
Improved Unity Script

Pamela Conley

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