Inno Setup doesnt restart at PrepareToInstall section

Question

I am trying to prompt the user to restart the computer after enabling .NET 3.5, which is necessary for MSSQLServer. Example:

function PrepareToInstall(var NeedsRestart: Boolean): String;
begin
  Log('PrepareToInstall() called');
  GetWindowsVersionEx(Version);
  if (Version.Major = 10) then begin
   NeedsRestart :=True;
  end
end;

Am i missing something?

Answer 1

NeedsRestart parameter is considered only if PrepareToInstall event function actually aborts an installation (by returning a non-empty string). What you probably do not want to do. In other words, you are abusing PrepareToInstall event function (and incorrectly anyway).

Use NeedRestart event function instead:

[Code]

function NeedRestart(): Boolean;
var
  Version: TWindowsVersion;
begin
  GetWindowsVersionEx(Version);
  Result := (Version.Major >= 10);
end;