I would recommend updating CIS using the first 5 steps below whether you've had problems or not. This will likely avoid most problems you could otherwise encounter. Also, it is a good idea to make a system restore point before attempting any of these fixes. This way if something goes wrong you can easily recover.
1. If you're having trouble with constant update notifications first check out the advice given in
this post as it may fix your problem without forcing you to go through all the work of completely reinstalling CIS.
2. If this doesn't help, or you had a different problem, then you may want to completely reinstall CIS. To be safe you should uninstall CIS with
Revo Uninstaller Free. This will make sure that almost every file from your previous version was removed before you install the new version. Just start Revo and wait until Comodo Internet Security (or Firewall/antivirus, depending on which type you have installed) is listed. Note that for x64 machines Revo will not locate CIS. You should uninstall CIS through the "add/remove programs" in the control panel. Otherwise, in Revo, choose to uninstall CIS using the moderate search option. Revo will first uninstall it normally using the builit-in CIS uninstaller. When the CIS uninstaller finishes it will prompt you to reboot, but select no and let Revo complete its process. It will then search for, and find, most files/entries that are left over. I would recommend that you delete all. After this restart your system. As a warning please do not use 'Hunter Mode' in Revo. This can be dangerous.
3. Now run the
Uninstaller Tool for CIS? Once it's done restart your computer. Then you may want to run it again, just to make sure that it got everything. Also, if you're unable to uninstall CIS normally, you will need to first disable D+ before running this tool. This is another way to uninstall CIS, although it's best to use the normal uninstall first, whenever possible.
4. Also, if you had a different security program installed before you tried uninstalling CIS, then part of the problem could be due to interference from some leftover files. First, make sure that you have uninstalled that product, using Revo Uninstaller if possible, but at least make sure it's uninstalled. Now run the removal tool for each of those security programs that you used to have installed. Here's a list of
uninstallers for common antivirus software. Please select the ones for any security programs you previously had installed and run them. This should fix most problems due to previous security software.
5. Download the latest version of
Comodo Internet Security and install it. Everything should now hopefully go flawlessly and you will now have the latest version installed on your computer. If this works then you don't need to follow the rest of the steps. However, if you fall in that other category then keep reading. There's still more things that we can try.
6. You can also try cleaning your computer with a registry cleaner. This may help fix some problems. You can use the registry cleaner in
Comodo System-Cleaner if you like. Whichever registry cleaner you choose, you should make a full registry backup before removing anything. Once it's finished cleaning you should restart your computer. After restarting the computer you can now try downloading, and installing, the newest version of CIS.
7. If none of these methods work then please start your own topic in the
Install / Setup / Configuration Help - CIS section. People will examine your specific case and try to help you figure out what's interfering with the installation. Just make sure you supply the information suggested
in this post. Also, please note which of the methods discussed above you have already tried and what the results were.
In case you also wanted advise on how to configure CIS, once it's correctly installed, here's my guide on
How to Install and Configure Comodo Internet Security for Maximum Protection.
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