ASP.NET 4 registry changes

While monitoring our production servers for un开发者_运维知识库authorized changes I have noticed that the following registry key changes regularly.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ASP.NET_4.0.30319\Names

Can anybody give me some insight into why this value keeps changing?

Regards, David

Some quick debugging shows that the values matches active process ids related to asp.net (w3wp.exe and aspnet_state.exe). I don't know what the base64 encoded key represents, but the value changes can be explained by changing processor ids (recycling, reboots, etc)