ACS install crashes during the installation in Windows

During installation of the latest version of ACS we encountered a crash during the installation in Windows.
I investigated the install_acs_32_allusers.js and install_acs_32.js scripts and discovered the error to have the same reason.

In install_acs_32_allusers.js it fails in line 579 where the following code is found:

// Create the IBM directory if it does not exist
if (!fso.FolderExists(log_target)) {
fso.CreateFolder(log_target); // <<- line 579
}
Further study showed that the variable log_target had the value H:\

So how did it get this value?
It is initiated in the beginning of the script where HomePath and HomeDrive is retrieved from the DOS environment variables with the same name.
The code is here (commented lines are dropped):

HomePath = Shell0.ExpandEnvironmentStrings("%HOMEPATH%");
HomeDrive = Shell0.ExpandEnvironmentStrings("%HOMEDRIVE%");
HomePath = (HomeDrive + HomePath);

// Set all users install path
ensure_elevated_privileges();
InstallPath = "C:\\Users\\Public";
DesktopPath = "C:\\Users\\Public\\Desktop";

target1 = (InstallPath + "\\IBM");
target2 = (InstallPath + "\\IBM\\ClientSolutions");

// Set log path
log_target = (HomePath + "\\IBM");

In our system the DOS environment variables HOMEPATH and HOMEDRIVE does not contain the default values that are normally found in a Windows 7 environment. This causes the error.
We do not have the possibility to change these settings.
 
I would suggest that log_target (log path) is set equal to the target2 so that the log file is located in the same directory as the installed programs.
So the line
log_target = (HomePath + "\\IBM");

Should be changed to
// Set log path
log_target = target2;

Set
log_target = target2;

so that the log file is located in the same directory as the installed programs. And the installation script will not crash.