Charlie. Thanks for your detailed response.
The full logs are:
May 17, 2017 5:03:28 PM org.apache.catalina.core.AprLifecycleListener lifecycleEvent
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\ColdFusion2016\cfusion\lib;C:\ColdFusion2016\cfusion\jintegra\bin;C:\ColdFusion2016\cfusion\jintegra\bin\international;C:\ColdFusion2016\cfusion\lib\oosdk\classes\win
May 17, 2017 5:03:29 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-nio-8501"]
May 17, 2017 5:03:29 PM org.apache.tomcat.util.net.NioSelectorPool getSharedSelector
INFO: Using a shared selector for servlet write/read
May 17, 2017 5:03:29 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["ajp-nio-8016"]
May 17, 2017 5:03:29 PM org.apache.tomcat.util.net.NioSelectorPool getSharedSelector
INFO: Using a shared selector for servlet write/read
May 17, 2017 5:03:29 PM org.apache.catalina.core.StandardService startInternal
INFO: Starting service Catalina
May 17, 2017 5:03:29 PM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/8.0.32
May 17, 2017 5:03:31 PM org.apache.jasper.servlet.TldScanner scanJars
INFO: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
05/17 17:03:32 INFO License Service: Flex 1.5 CF Edition enabled
05/17 17:03:32 INFO Starting Flex 1.5 CF Edition
May 17, 2017 5:03:32 PM org.apache.catalina.core.ApplicationContext log
INFO: ColdFusionStartUpServlet: ColdFusion: Starting application services
May 17, 2017 5:03:32 PM org.apache.catalina.core.ApplicationContext log
INFO: ColdFusionStartUpServlet: ColdFusion: VM version = 25.72-b15
May 17, 2017 17:03:33 PM Information [localhost-startStop-1] - Starting logging...
May 17, 2017 17:03:33 PM Information [localhost-startStop-1] - Starting license...
May 17, 2017 17:03:33 PM Information [localhost-startStop-1] - Developer Edition enabled
May 17, 2017 17:03:33 PM Information [localhost-startStop-1] - Starting crypto...
May 17, 2017 17:03:33 PM Information [localhost-startStop-1] - Installed JSafe JCE provider: Version 6.21 Crypto-J 6.2.1, EMC Corporation. JsafeJCE Security Provider (implements RSA, DSA, ECDSA, Diffie-Hellman, ECDH, AES, DES, Triple DES, DESX, RC2, RC4, RC5, PBE, MD2, MD5, RIPEMD160, SHA1, SHA224, SHA256, SHA384, SHA512, HMAC-MD5, HMAC-RIPEMD160, HMAC-SHA1, HMAC-SHA224, HMAC-SHA256, HMAC-SHA384, HMAC-SHA512, HMACDRBG, HASHDRBG, CTRDRBG, FIPS186PRNG, SHA1PRNG, MD5PRNG; RFC 3394, RFC 5649 AES Key Wrap; X.509 CertificateFactory; PKCS12, PKCS15 KeyStore; X.509V1, PKIX, PKIX-SuiteB, PKIX-SuiteBTLS CertPathValidators; X.509V1, PKIX, PKIX-SuiteB, PKIX-SuiteBTLS CertPathBuilders; LDAP, Collection CertStores)
May 17, 2017 17:03:33 PM Information [localhost-startStop-1] - Starting security...
May 17, 2017 17:03:33 PM Error [localhost-startStop-1] - Unable to initialise Security service: coldfusion.server.ServiceException: coldfusion.wddx.WddxDeserializationException: WDDX packet parse error at line 1, column 1. Content is not allowed in prolog..
coldfusion.server.ServiceException: coldfusion.wddx.WddxDeserializationException: WDDX packet parse error at line 1, column 1. Content is not allowed in prolog..
at coldfusion.security.SecurityManager.loadSecurity(SecurityManager.java:1418)
at coldfusion.security.SecurityManager.load(SecurityManager.java:1375)
at coldfusion.server.ServiceBase.start(ServiceBase.java:59)
at coldfusion.security.SecurityManager.start(SecurityManager.java:1365)
at coldfusion.server.CFService.setupSecurity(CFService.java:438)
at coldfusion.server.CFService.start(CFService.java:560)
at coldfusion.server.j2ee.CFStartUpServlet.startCFService(CFStartUpServlet.java:565)
at coldfusion.server.j2ee.CFStartUpServlet.init(CFStartUpServlet.java:508)
at javax.servlet.GenericServlet.init(GenericServlet.java:158)
at coldfusion.bootstrap.ClassloaderHelper.initServletClass(ClassloaderHelper.java:121)
at coldfusion.bootstrap.BootstrapServlet.init(BootstrapServlet.java:59)
at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1238)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1151)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1038)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5049)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5341)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
May 17, 2017 17:03:33 PM Error [localhost-startStop-1] - Unable to initialise CFStartupServlet:coldfusion.wddx.WddxDeserializationException: WDDX packet parse error at line 1, column 1. Content is not allowed in prolog..
May 17, 2017 17:03:33 PM Information [localhost-startStop-1] - Shutting down servlet container...
I will look at what you suggest in the two extended posts, but in the meantime the above might throw a more focused light on the problem I have.
Vincent
Good news/bad news. The log confirms that the error you reported is indeed the first one in the log. And it explains the problem: a issue with C:\ColdFusion2016\cfusion\lib\neo-security.xml, which has a "parse error" at line 1, column 1.
I'm betting that if you open that file, you will find that it is empty. It shouldn't be. Or if it's not empty, it's mal-formed (not valid XML, or more specifically not valid WDDX-formatted XML).
The first question would be how it got empty or mal-formed. But that may take time to find and resolve.
But for now, you may want to check if the neo-security.bak file, in the same directory, is also empty or mal-formed. If it is not, and you renamed the other and renamed this to be neo-security.xml, and restarted CF, would things work (no more error, pages load)? But it may be borked also.
In that case, do you have any sort of backup of the file system that you could revert to?
Assuming you do not, sadly someone can't just "share theirs" with you because the info in the file is unique to each user. This file holds the CF admin security configuration settings (representing checkboxes checked, etc.). And anyone else's xml file would represent settings that they picked that you may set differently.
Even so, if you're desperate, here is the content of mine, from CF2016 also. (I wiped the value of my "userid.root.salt" value, as I'm pretty sure that's different on every install. It's not the password, but the salt value used to encrypt the password, stored in another file). Keep reading below this for a couple more thoughts:
<wddxPacket version='1.0'><header/><data><struct type='coldfusion.server.ConfigMap'><var name='AuthorizedUsers'><struct type='coldfusion.util.FastHashtable'></struct></var><var name='admin.userid.root'><string>admin</string></var><var name='CrossSiteScriptPatterns'><struct type='coldfusion.server.ConfigMap'><var name='<\s*(object|embed|script|applet|meta)'><string><InvalidTag</string></var></struct></var><var name='admin.userid.root.salt'><string>00000000000000000000000000000000</string></var><var name='rds.enabled'><string>true</string></var><var name='allowconcurrentadminlogin'><boolean value='true'/></var><var name='allowedAdminIPList'><string></string></var><var name='contexts'><struct type='coldfusion.server.ConfigMap'><var name='/'><struct type='coldfusion.server.ConfigMap'></struct></var></struct></var><var name='admin.security.enabled'><boolean value='true'/></var><var name='admin.userid.required'><boolean value='false'/></var><var name='secureprofile.enabled'><boolean value='false'/></var><var name='rds.security.enabled'><string>true</string></var><var name='sbs.security.enabled'><boolean value='false'/></var><var name='rds.security.usesinglerdspassword'><boolean value='true'/></var></struct></data></wddxPacket>
You would want to stop CF, then edit your neo-security.xml putting this in its place. BEfore you do, read to the end for an edit you may want to make. (And if you're on Windows and edit it with Notepad and find you can't save the edits due to permissions issues, even though you ARE an Admin, this is a limit of Notepad. You could open it as Admin, or just save the changed file in your documents folder then copy/paste it with windows explorer, and THAT will prompt you to elevate your privileges to let you paste the file, while Notepad would not let you save it.)
Now, back to the file contents, because you would now have a different salt value, you'll find that your current CF Admin (and I think DSN) passwords will not work. So you'd find you could not login to the CF Admin. But note that you can set this element:
<var name='admin.security.enabled'><boolean value='true'/></var>
to
<var name='admin.security.enabled'><boolean value='false'/></var>
And now (after a restart) you could login, without any password. Then you could go to the CF Admin Security page, and modify the salt to some other value (than all 0's), and then enter a new password (and choose the drop down on that page to require a CF Admin password). Again, you may have to redo your DSN passwords. Try verifying one that worked. If it does not, just enter it again in the DSN settings page, and (because it will now be set with the salt you picked) it should verify now.
Let us know how it goes.