Hi,

This is an internal error code associated with Kaspersky Internet
Security and Antivirus software. This error pops up when Kaspersky
Internet Security software fails to install on your PC successfully.

To successfully overcome this problem and ensure successful
installation of Kaspersky Internet Security software on your system, you can try
the methods given below.

Method 1- Remove the Leftover Registry Key

Sometimes Internal error code 2771 may appear during installation due to the leftover registry key from the previous Kaspersky software removal.

A registry key is often created when uninstalling previous Kaspersky
version from the PC. This key is left behind even after you reboot your
system.


This key is called avp**_post_ uninstall, you need to delete it to
ensure the new version of Kaspersky program is installed successfully on
your PC.

For this, simply go to the start menu and type Regedit in the
search bar.


Now navigate to
HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionRun and
then look here for the registry key called avp**_post_ uninstall. In
order to delete this file, right click it and then select delete.


Once uninstalled, reboot your PC and then try installing Kaspersky Internet Security program again.

Method 2 – Remove the INFCAHCE.1 Corrupt File

Another reason for the error pop up may be INFCAHCHE.1 corruption.

This file is basically used to store driver information and inf file
locations. However, if it contains corrupted information, then you must
remove it.


To do this, go to the start menu and type cmd into the search bar.

This will open a command prompt.

Here type del
C:Windowsinfinfcache.1.

Now reboot your PC and try installing
Kaspersky software on again.

Method 3 – Fix Software Conflict

Security software conflict can also result in internal error 2771
code display. And when this happens, installation of Kaspersky
prematurely ends.


Security software conflict may occur if you have Comodo Firewall
installed on your PC. Firewall is known to cause issues with Kaspersky
software programs.


The best way to resolve this issue is to uninstall all security
software programs on your PC. Once all security software are removed,
then install Kaspersky on your system. If the installation is
successfully completed, then reinstall the other software again.


I hope this helps.

Regards,
Lokesh