hmm well 2 things, 1. there is an edit button cuz double posting is against the forum policy (just a heads up so you don't get a warning
) and for your problem. I would suggest you PM Smith, he's a moderator on these forums, and he is really good with PC's i'm almost certain he can help you out with your problem
::EDIT::
No there is only one kind of half life- they are all the same. Give me a second while i try to find a way to help you
EDIT:: for the time being, PM Smith, i think he can help you
http://www.forum.esforces.com/member.php?u=6693
look for the "send a Private Message" and i'm sure he'll help
::EDIT3::
I think i found your solution try this::
"C:\WINDOWS\SYSTEM32\AUTOEXEC.NT. The system file is not suitable for running MS-DOS and Microsoft Windows applications. Choose 'Close' to terminate the application."
The reason that this error is occurring is due to the AUTOEXEC.NT file not existing in the System 32 folder. It appears that many preventative software pieces such Pop-Up blockers, spyware, adaware programs are recognizing this file as being associated with viruses and removing the file.
To fix this error,right click on the attachment AUTOEXEC.NT located below under "Article Attachments"; then click on SAVE TARGET AS, and save it into the System32 folder. This can be completed by saving the file into C:\WINDOWS\system32 if you are running Windows XP.
Then proceed to open up the program again. You should now be able to open the program without seeing this error.