Some performance counters shows wrong values after installing .net 4.5

[Koise]

after installing .NET 4.5 on a Windows Web Server 2008 R2, some performance counters shows the wrong values. I'm using the built in Performance Monitor and looking at the groupASP.NET Apps v4.0.30319 for counters Anonymous Requests/Sec and Requests Executing.Before those values reflected the current load with fluctuating values, but now they instead increases for each request, so they behave more like Total Requests and Total Requests Executing. We have seen the same behavior in a production environment and also on internal servers.Have any of you seen the same behavior, I can find anything when googling for it.RegardsPatrik