You cannot install Kaspersky software because it say Digital signature of installation files is missing, and you need answers.
At the point of installation you receive an error:
"Error has occurred. Application was not installed. Digital signature of installation files missing"
You may try the following ways to fix that.
Picture for error: "Digital signature of installation files missing"
Step #1: Check the authenticity of the downloaded installer and re-download Kaspersky from Kaspersky site.
You may download the latest version from the lists below.
Kaspersky products site: http://products.kaspersky-labs.com/
Home page Kaspersky: http://www.kaspersky.com/product-updates
You install the file from the Kaspersky CD that you bought recently. Try to re-install Kaspersky from a different Kaspersky CD. You can also download the installation file from Kaspersky site.
Step #2: Check the system date on your computer.
Make sure the system date on your computer is correct.
a. Windows XP
In the lower right corner of the screen in the taskbar double-click the Clock.
In the dialog window that opens, you check the set date (day, month, year) with the current calendar date.
If the date is incorrect, you need set the current calendar date
Click on the OK button.
b. Windows 7 or Vista
In the lower right corner of the screen in the taskbar, You double-click the Clock.
In the dialog window that opens, You click on the 'Change date and time...' link.
In the next dialog window, You click on the 'Change date and time' button.
In the dialog window 'Date and Time Settings' set date (day, month, year) with the current calendar date. and click on the OK button.
c. Windows 8 or 8.1
Go to Desktop from Start screen
In the lower right corner of the screen, You double-click the Clock.
In the dialog box that opens, click on the 'Change date and time settings' link.
If you're prompted for an administrator password, enter the password and click on the Yes button.
Click on the 'Date and Time' tab, and then click 'Change date and time' button if the date is set incorrectly.
When you have finished changing the time settings, click on theb OK button.
d. Windows 10
Go to Desktop.
Double-click the bottom-right clock icon on the desktop.
In the dialog window that opens, click on the 'Change date and time settings' link.
As the Date and Time window opens, select Date and Time tab.
Click on the Change date and Time… button.
In the dialog box that opens, respectively change date and time if the date is incorrect.
Click on the OK button to confirm the changes.
Check the system date on your computer
Step #3: Check your Internet connection via the browser Internet Explorer (IE)
By default Kaspersky Lab products are activated via the browser Internet Explorer.
To check your internet connection, open the browser IE and visit the site kaspersky.com
Try to install Kaspersky again. If errors still occur, go to step #4.
Step #4: Run the fix tool and reboot your computer.
(Failed to add certificate to Third-Party Root Certification Authorities store with error: Access is denied.)
1. Download the fix tool.
Or link 2:
2. Run the fix tool.
- Unzip the downloaded file: Right-click on the downloaded file and select 'Extract Here'.
- Run the signature.BAT, then click on the OK button, repeatedly until the process is complete.
Windows XP: Double click on the signature.BAT to run the process.
Windows Vista/ 7/ 8/ 8.1/ 10 or a later version: Right-click on the signature.BAT and select ‘Run as administrator’, then click on the OK button.
- Run the rootsupd.exe, and until the process is complete (this might take several minutes). Please be patient.
- Reboot your computer.
- Reinstall Kaspersky again.
If still no go, please contact Tech Support: https://my.kaspersky.com/en/support/helpdesk
Check for viruses: The tool is safe.
To help make this process easier for you, watch it on YouTube!
suresh on August 15, 2017:
this is not working please suggest different way for install digital signature file
Karim Aweida on June 09, 2017:
I don't have :
and when I downloaded them it dosen't work with x64 I found them only for 32-bit
please help me