Just bought my 1st games
Non of them will Install


I just get runtime error

Don't know what to do

First, this is a question for the general forums. More people will see it and it isn't specific to any game.

Second, more information would be useful. Are you using the GOG Downloader? Are you directly downloading the file?
What OS are you using? Is there an antivirus or firewall program that can cause problems?