Go grab the 64bit trial download from Autodesk's website and use that for the installation.
Empty that TEMP folder listed in the pop-up, do not run anything from there like you did last time.
Ensure that you restart Win7, turn off all running background applications, be logged in as full administrator in Windows 7, and run the downloaded installer. I recommend you perform a complete download first and resist installing while downloading.
If you are still having issues, you need to share all the above information in a repost to the Installation forum at
So, I reinstalled Windows 7 x64. Then downloaded the Trial Software from AutoDesk. Sure enough it installed correctly.
Thanks for all you help!!
Great news: I suspect (you need to verify it with your IT) that your Windows is set to find and run the first EXE it finds on a disk and that may have been the problem. Worth turning that ability off as it exposes your system to possible virus installations etc.
Once again I am experiencing the same problem. Only this time, I am running the downloaded version from AutoDesk.
I reinstalled Windows 7 x64 on my computer, and when I try to get run the install I get the same error.
Why would the x64 version be trying to run a file from the x86 folder?
Has anyone else seen this issue?
I didn't it is a different machine.
But I was able to get it to install. This time in order to get it to install I had to login as the Local Administrator and turn off my Trend Micro AntiVirus.
Luckily I am the IT admin here so I am able to do these things.
Can I add to this discussion because we had the exact same problem as the first email on 3-7-13. The odd thing is that we have two identical laptops running WIN7/64 and two identical copies of AutoCAD LT2013 - and the standard installation worked perfectly on one laptop. Of note, the CD/DVD indicates that it is good for 32/64 bit installations, i.e. no seperate CD.
So I went into the CD and navigated to the x64/en-US folder and ran setup from there. Now it can't find another file - acadltlp.msi. What to do?
Brilliant - it worked, thank you! And you didn't even know that we were also using Trend Micro AV when you made your suggestion.