AutoCAD MEP 2013 install failure after AutoCAD 2013 electrical trial

[rmghchris]

Recently upgraded from a "license model"  AutoCAD Mechanical 2012 to the stand-alone AutoCAD 2013 MEP. I purchased AutoCAD 2013 digitally after trying AutoCAD Electrical (demo version) for about a week.  I would like to keep AutoCAD 2012 on my computer as well as the new 2013 I just purchased if possible.

When I attempt to install I keep getting the same problems - the 1603 and 1609 errors:

InstallAutoCAD® MEP 2013 Product Specific PackFailedInstallation aborted, Result=1603

RollbackDirectX RuntimeFailedFailure is ignored, Result=1619 

Running Windows 7 64 bit on a computer that ran AutoCAD 2012 just fine.  Logged in as administrator.  Rebooted

You can view my entire logfile here: https://dl.dropbox.com/u/1260771/MEP%202013%20Setup.log 

I have already tried:

• turning off UAC
• turned off firewall/anti-virus
• Making sure I had the latest version of DirectX
• Someone reccomended that I un-install SP1 for 2013- however when I went to my control panel there was no indication that 2013 was installed (perhaps the purchased version removed the demo version before the install?) Here is a screenshot - http://i.imgur.com/STlXWUD.png
• Did a manual un-install of 2013 - electrical and the remnants of MEP - per instructions here: http://usa.autodesk.com/adsk/servlet/ps/dl/item?siteID=123112&id=18853994&linkID=9240897 

Still arriving at the same exact errors. Any advice?

* this may be relevant *

Since the error involved DirectX I did a dxdiag and saw the following:

DirectX Version: DirectX 11

DX Setup Parameters: Not found

[TravisNave]

When installing 2013, do not install the service pack with the installation.  That seems to be where it is failing according to your log. 

As for running 2012, you cannot legally continue to do so unless you are under Subscription.