Certain Sites not working on LocalHost (no replies)

I've been having this problem on and off for the past few months and I am very confused as to what is going on.

It has been happening on two of my computers, one of which is Windows 7 and the other Windows 10.

I have a whole bunch of virtual hosts set up and some of them seem to load fine with no problems.

However, there are a few which don't seem to load up, I keep getting problem loading page in my browser.

My hunch is that the DNS is not resolving correctly for these few virtual hosts, but I don't know how to test this or trace this.

I have checked the Apache log and there isn't much information there.

It seems to work some days and others it does not. I am at a point where I am completely lost.

Does anyone have any tools or tips on how to track this problem down?

Thanks!


Here is the loop I see in apache error log:
[Fri Jul 21 19:35:31.437481 2017] [mpm_winnt:notice] [pid 4416:tid 716] AH00428: Parent: child process 7072 exited with status 255 -- Restarting.
[Fri Jul 21 19:35:31.463913 2017] [auth_digest:notice] [pid 4416:tid 716] AH01757: generating secret for digest authentication ...
[Fri Jul 21 19:35:31.581536 2017] [mpm_winnt:notice] [pid 4416:tid 716] AH00455: Apache/2.4.23 (Win32) OpenSSL/1.0.2l PHP/5.6.25 configured -- resuming normal operations
[Fri Jul 21 19:35:31.581536 2017] [mpm_winnt:notice] [pid 4416:tid 716] AH00456: Apache Lounge VC14 Server built: Jul 1 2016 11:09:37
[Fri Jul 21 19:35:31.581536 2017] [core:notice] [pid 4416:tid 716] AH00094: Command line: 'c:\\wamp\\bin\\apache\\apache2.4.23\\bin\\httpd.exe -d C:/wamp/bin/apache/apache2.4.23'
[Fri Jul 21 19:35:31.583568 2017] [mpm_winnt:notice] [pid 4416:tid 716] AH00418: Parent: Created child process 14492
[Fri Jul 21 19:35:31.858327 2017] [auth_digest:notice] [pid 14492:tid 660] AH01757: generating secret for digest authentication ...
[Fri Jul 21 19:35:31.930724 2017] [mpm_winnt:notice] [pid 14492:tid 660] AH00354: Child: Starting 64 worker threads.
[Fri Jul 21 19:35:34.829460 2017] [mpm_winnt:notice] [pid 4416:tid 716] AH00428: Parent: child process 14492 exited with status 255 -- Restarting.