Error unisntall exchange server

IIS Admin Service Troubleshooting

# Stop and Restart IIS Services
net stop "World Wide Web Publishing Service"
net stop "IIS Admin Service"
net start "IIS Admin Service"
net start "World Wide Web Publishing Service"

# Check Service Status
sc query "IIS Admin Service"

Exchange Cleanup Steps

# Disable Exchange Services
net stop MSExchangeADTopology
net stop MSExchangeFrontEndTransportService

# Remove Exchange Registry Entries
reg delete "HKLM\SOFTWARE\Microsoft\Exchange" /f

# Clean Up Remaining Exchange Directories
Remove-Item "C:\Program Files\Microsoft\Exchange Server" -Recurse -Force

Active Directory Cleanup

# Remove Exchange Objects from Active Directory
# Use ADSI Edit or PowerShell Active Directory Module
# Carefully remove:
# - Exchange Administrative Groups
# - Exchange Servers
# - Exchange Organization

Prerequisite Repair 

# Reinstall Windows Features
Install-WindowsFeature Web-Asp-Net45
Install-WindowsFeature Web-Net-Ext45
Install-WindowsFeature Web-Windows-Auth

# Reset IIS
%windir%\system32\inetsrv\appcmd uninstall module "WebDAVModule"