Thank you.

Uninstall Turbo CAD

Disable DEP

Run CMD as admin and punch in:

bcdedit.exe /set {current} nx AlwaysOff

Then go into the control panel and turn off user Account Control

Reinstall Turbo CAD

This worked for me, apparently these two forms of protection mess something up when installing, I had problems installing Lightwright4 as well and by turning these off it allowed for a proper install. I can now run turbo CAD on my machine by following these steps.

WARNING: Following these steps does lessen the security on your computer.

What does DEP do?
It is basically a permanent exile for any process which misbehaves once…
“Misbehaves” can mean that the application “fails to respond” and either crashes or the user becomes impatient with the time it takes to access the application during for example, a rendering operation. Once it triggers the feature, the block becomes permanent.

There is no option in the DEP settings to do this. You are presented with the default which is that DEP will only restrict function of “critical windows processes.” What they fail to mention is that any application which hooks the kernal is a “critical windows process.” Now this wasn’t designed necessarily as some evil conspiracy but it has been terribly badly implimented… but then it’s Microsoft.
The other option you are offered by the DEP settings is that you can enable DEP for all applications and then individually flag each executable that you want to permit to be immune from it. This will work, if you want to sit there and check off each and every exe file that you want to allow to run correctly.

DEP is intended to be a security feature and it will work that way… because any spyware/malware/virus ect will also trigger it if it isn’t very very subtle about the use of memory. It would have to remain “under the radar” and never crash your system or it would be also exiled. So… keep this in mind if you choose to disable it.

Disabling DEP requires a little brain surgery. It requires changing one word in a system file located in the boot sector of the OS. The file is boot.ini. Accessing and editing this file directly could cause your system to be unable to boot if this is not done correctly, but there is a “failsafe” for that as well. This isn’t difficult. It simply must be done exactly right the first time.

Boot.ini contains the boot manager listings that are optioned when you start your system. IF you have more than one bootable partition, you get a selection menu at startup that lists the operating systems… If you have only one operating system you will never see this menu.

What this file does is list the boot options usually for separate operating systems. It can however be used to load the same operating system with different options.

To do this log in as an administrator, select My Computer from the desktop and right click. Select Properties and the Advanced tab.
In the Startup and Recovery panel select the Settings button. Then the “edit boot settings manually” button.

You should see something like this.

[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)\WINDOWS
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS=”Windows XP Professional x64 DEP Disabled” /noexecute=Optin /fastdetect

This says… essentially. “Put up the boot loader menu and after 30 seconds load the default if no selection is made… find this physical disk, this partition and use this option setting for DEP.”

If you add an additional option (simply copy and paste the line after [operating systems] so that you have two identical listings, like this…

[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)\WINDOWS
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS=”Windows XP Professional x64 DEP Disabled” /noexecute=Optin /fastdetect
multi(0)disk(0)rdisk(0)partition(8)\WINDOWS=”Windows XP Professional x64 DEP Disabled” /noexecute=Optin /fastdetect

Then modify the second listing and change the description text (the portion in quotation marks) displayed at boot so you can see which is which. Then change the DEP noexecute option to Alwaysoff

multi(0)disk(0)rdisk(0)partition(1)\WINDOWS=”XP Pro x64 DEP Optin” /noexecute=optin /fastdetect
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS=”XP Pro x64 DEP Disabled” /noexecute=AlwaysOff /fastdetect

What you will then see at Boot is

XP Pro x64 DEP Optin
XP Pro x64 DEP Disabled
Loading default in 30 seconds…

Use the up and down arrows to highlight the option you want and then Enter

This leaves your original setup as the default boot option, but also allows you to boot to the same exact boot partition, with DEP turned off. This removes the DEP problems without removing DEP entirely. If you do get a computer virus or malware and are having trouble with it, you can reboot to the DEP option and allow DEP to stop it from running, and then use the appropriate utilities to repair the problem.

In the meantime DEP will leave your applications in peace when you are doing memory intensive stuff like rendering, without Turbocad being sent to “Cyberia.”

When you want to run applications that aren’t DEP friendly, boot to your DEP disabled boot option. Otherwise you can boot to the default and enjoy the added safety DEP affords for those applications that tolerate it. This doesn’t make your system any more vulnerable to catching a virus than it ever was. It does turn off DEP which in some cases will stop the virus from taking control of your system. Proper user practices and good anti-virus software should keep your system safe… Having the option to turn DEP off while you work will not turn off your antivirus, it will just disable the ability of Windows to prevent the virus from running by itself.

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