As per checking this type of error, some few cases I found were resolved by performing a clean uninstall and install of the product which involved updating some registry on the user's machine. If you have not done this, please consider performing the below:
1. Remove any *.slip or reg*.txt files located in the following directory:
C:\Users\<your user name>
2. Delete the following folder:
C:\ProgramData\Embarcadero (this is a hidden folder which you need to enable first)
3. Clear out and delete all files and folders in your temp folder:
C:\Users\<your user name>\AppData\Local\Temp
4. Perform a complete manual uninstall of 10.2 Tokyo:
https://community.embarcadero.com/ar...c-builder-10-2
5. Install the product once more
NOTE: Please make sure that when you run the install of the program, you have your antivirus/firewall temporarily disabled and you should be running the executable file as Administrator (right click the exe and select "Run as Administrator")