CF 11 install issues

Issues installing CF 11 development server on Windows 7 Professional.
Have installed and uninstalled a handful of times and even when it seems that all installed ok everything is slower than you can imagine - web pages and even the CF administrator - like 30 seconds to load a different page.
Also I get this error alert in CF Administrator on Server Update > Updates page:
Error invoking CFC /CFIDE/administrator/updates/download.cfc : WDDX packet parse error at line 1, column 1. Content is not allowed in prolog.. [Enable debugging by adding 'cfdebug' to your URL parameters to see more information]

If it matters I have CF 9 installed but is stopped & disabled.

Any ideas?
LVL 25
dgrafxAsked:
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Mark ElySenior Coldfusion DeveloperCommented:
The problem is IIS is still referencing the CF9 paths.  Although you can run both versions on the same server Adobe recommend a fresh install.  Go through IIS/Handlers and make sure you delete any references to that old version.  

We had a similar problem.  This article address problems we encounter and the fixes.  
http://thinkonthesethings.net/index.cfm/web-development-full-stack/stone-coldfusion/reinstalling-coldfusion-and-some-quirky-permissions-issues/

Charlie Arehart has several articles on how to verify you have properly removed phantom references and reset the web connectors.
http://www.carehart.org/blog/client/index.cfm/2013/9/13/why_you_must_update_cf10_webserver_connector


Download the ColdFusion LockDown Guide and follow it step by step:
http://www.adobe.com/content/dam/Adobe/en/products/coldfusion/pdfs/cf11/cf11-lockdown-guide.pdf
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dgrafxAuthor Commented:
You the man Mark!
I almost uninstalled CF9 but it's an actual version so wanted to keep it as CF11 is trial/dev ...

Thanks!
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