Windows Process Activation Service Error 2:The system cannot find the file specified

IIS on my development computer stopped working. I just installed the latest update to windows 10 (1803) and now when I try to start the "Windows Process Activation Service" I get an "Windows could not start the Windows Process Activation Service on Local computer. Error 2: The System cannot find the file specified" error. Things I have already tried:

• Reinstalled IIS and Windows Process Activation Service, several times
• I verified that I do have a "C:\inetpub\temp\appPools" folder

Not sure what to do next.

I have had this problem twice after a windows update. The issue seems to be, that windows adds an incorrect parameter to the WAS service startup parameters. I fixed the issue using the following steps:

• Start regedit (just type it into start)
• Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WAS\Parameters
• Delete the NanoSetup variable. This variable is preventing WAS from starting
• Start the WAS service using task manager or by typing "net start WAS" in Command Prompt
• Start the W3SVC service the same way
• You can now start your website in IIS again