Issue when upgrading microsoft framework.net 4.5.2

Hi,

We have many autormated .net builds on our build server. We upgraded to Microsoft .net framework 4.5.2 from 4.5.1.

All of our ms builds are now broke. This is the error message - does anyone have anything that could help?

Error message

Invoking build participant "com.ibm.team.build.cmdline"

java.io.IOException: Cannot run program "C:\Windows\Microsoft.NET\Framework\v4.0.30319" (in directory "D:\Builds\MHTS.WEB.INT"): CreateProcess error=5, Access is denied

      at java.lang.ProcessBuilder.start(Unknown Source)