How to Install CAD ESTIMATOR on Windows 10 64 bit

You get the message “This App cannot run on your PC”

When you try to run CAD ESTIMATOR and get the message “This App cannot run on your PC” it means you will have to install  VIRTUALBOX (free software from ORACLE) and then install  Window 7 professional 32 bit into the virtual machine. CAD ESTIMATOR will then need to be installed on the virtual machine. You will have to modify a system file on the virtual machine for CAD ESTIMATOR to run without causing a intermittent General Protection Fault and closing the program.

CAD ESTIMATOR runs but crashes intermittently

If CAD ESTIMATOR is running on your 64 bit machine without having to install VIRTUALBOX it means the manufacturer has already set up a virtual machine. You will have to modify a system file on the virtual machine for CAD ESTIMATOR to run correctly

How do I modify the system file “autoexec.nt”

In Windows 10 you need to find notepad and launch it by right clicking on the icon and selection “Run as Administrator”

In Windows 7 you need to right-click the window explorer on your task bar and  select “Run as Administrator”, navigate to the file and open it with Notepad.

How To Fix Win87em.dll – STEPS

1. Download winfloat.exe from http://www.conradshome.com/win31/archive/

2. Open winfloat.exe in its own folder. Find the file HIDE87.com

3. Copy HIDE87.com to C:\Windows\System32\

4. Open c:\windows\system32\autoexec.nt with notepad

5. At top of file, after first group of comments add the following

lh %SystemRoot%\system32\HIDE87.com

6. Add a comment above your last line

REM Fix for Gen. Protection Fault in win87em.dll

7. Save changes to autoexec.nt and reboot pc.