"docker build -t mymicroservice ." returned error message

Problem encountered on https://dotnet.microsoft.com/learn/aspnet/microservice-tutorial/docker-image
Operating System: windows

Provide details about the problem you're experiencing. Include your operating system version, exact error message, code sample, and anything else that is relevant.

Hello,

So far I had went through each step without issues and when I got to the "docker build -t mymicroservice ." step, it returned the following error message:

error during connect: In the default daemon configuration on Windows, the docker client must be run with elevated privileges to connect.: Post "http://%2F%2F.%2Fpipe%2Fdocker_engine/v1.24/build?buildargs=%7B%7D&cachefrom=%5B%5D&cgroupparent=&cpuperiod=0&cpuquota=0&cpusetcpus=&cpusetmems=&cpushares=0&dockerfile=Dockerfile&labels=%7B%7D&memory=0&memswap=0&networkmode=default&rm=1&shmsize=0&t=mymicroservice&target=&ulimits=null&version=1": open //./pipe/docker_engine: The system cannot find the file specified.

The powershell prompt I am using was "Run as administrator".