I used the Kaspersky Removal Tool to remove KIS 17(f) Then, I rebooted and installed KIS 18.0.0.405(b)
Then I rebooted again to update the KIS database.
The application error messages started upon reboot (0xc0000005) Programs such as Spyshelter Premium, Ranstop and a host of others popped up in error.
I cannot use Revo Uninstaller Pro to uninstall KIS because I get the exact same error message (Revo will not open)
When I try to uninstall KIS via the control panel I am unable because of Error Message 1719 (Windows Installer service could not be accessed)
I am also not able to relaunch the 2018 installer to select a "Repair" option as the installer will not open
Ah, I see that it's not limited to KIS installation, and I'm familiar with this "Application was not able to start correctly". However, there can be a few different causes of the corruption and it will need some troubleshooting.
In my case, it was when I installed Emsisoft AM as an on-demand scanner (passive mode) alongside KIS. KIS set the a2start exe of Emsisoft to Restricted. Next, I was unable to open
any applications like in your case and confronted the same error.
Even if I would set it to Trusted, the same errors appeared. Possibly the scan of apps beings launched couldn't be complete? Luckily, I was able to Uninstaller EAM/remove its files and the errors were resolved.
So, a small input I can give is to look if there're some other security apps that can interfere. Can you list down your security apps (like the SpyShelter FW) here? I'm not sure if that will help ahead but that can be a potential cause. I don't think experimenting in Safe Mode will help here.
Also if you can launch the KIS/KTS interface, can you see Application Activity log (by right clicking the Kaspersky icon) and see if Kaspersky blocked or restricted the applications that showed the errors? In my case, it used to show that the App X started and 'closed' immediately. Can you find that any other Security app also got launched close to the launch of that App X?