Hello,
One of our deployment had an installation of Microsoft Visual C++ Redistributable (x86) 12.0.3051 as a part of task sequence. After upgrading to SP1511, each fresh installation from this task sequence ended up in error and caused the SCCM client to hang. For some reason vcredist 12.0.3051 (x86) installation removes Microsoft Visual C++ 2013 Redistributable version (x86) 12.0.21005.1 that is prerequisite for SCCM client version 5.00.8325.100 to function.
There seems to be some discussion regarding this here:
https://social.msdn.microsoft.com/Forums/vstudio/en-US/c4f59459-51b8-47d7-9865-87552c221f95/vcredist-x86-installation-removes-x64?forum=vcgeneral
This here is just for heads up. Thank you for your time.