Apache :: AH00141 - Could Not Initialize Random Number Generator

I am attempting to install Apache HTTPD on a PC running Windows 7 Ultimate SP1.

VC9, VC10 & VC11 redistributables are installed.

When I attempt to start Apache - both from the command line and as a service - I receive the following error messages:

[Tue Aug 27 15:33:27.624800 2013] [mpm_winnt:notice] [pid 5192:tid 284] AH00455: Apache/2.4.6 (Win64) configured -- resuming normal operations
[Tue Aug 27 15:33:27.626800 2013] [mpm_winnt:notice] [pid 5192:tid 284] AH00456: Apache Lounge VC11 Server built: Jul 15 2013 20:45:22
[Tue Aug 27 15:33:27.626800 2013] [core:notice] [pid 5192:tid 284] AH00094: Command line: 'C:Apache24inhttpd.exe -d C:/Apache24'
[Tue Aug 27 15:33:27.667800 2013] [mpm_winnt:notice] [pid 5192:tid 284] AH00418: Parent: Created child process 7684
[Tue Aug 27 15:33:27.668800 2013] [mpm_winnt:debug] [pid 5192:tid 284] mpm_winnt.c(422): AH00402: Parent: Sent the scoreboard to the child
[Tue Aug 27 15:33:27.704800 2013] [:crit] [pid 7684] (-2146173818)Unknown error: AH00141: Could not initialize random number generator
[Tue Aug 27 15:33:27.709800 2013] [mpm_winnt:crit] [pid 5192:tid 284] AH00419: master_main: create child process failed. Exiting.
[Tue Aug 27 15:33:27.710800 2013] [core:info] [pid 5192:tid 284] AH00096: removed PID file C:/Apache24/logs/httpd.pid (pid=5192)

The Windows event viewer merely says that HTTPD stopped with an application-specific error #1.

I have also tried with SSL both enabled and commented out.

For what it is worth the message appears to be generated by the routine ap_init_rng in the server core.c module.