Windows WSL Ubuntu 18.04: How do I completely remove any traces of Ubuntu 18.04 from Windows 10?

So I was trying to install Windows WSL Ubuntu 18.04 from Powershell(Windows Build 17763) but it kept giving me an error like this.

Installing, this may take a few minutes...
WslRegisterDistribution failed with error: 0x800700b7
The filename, directory name, or volume label syntax is incorrect.

So then I tried it off the Windows store, which also failed. I got curious and started trying to download Ubuntu 16.04 instead and OpenSuse, which also had errors. The main error was that Windows was installing the Linux distros in D: drive instead C: drive by default. So I moved them from C drive to D drive. They worked fine because they were fresh installs. Now I tried doing the same to Ubuntu 18.04 and install it from the store, but it doesn't install, so I can't ever move it from D: to C:. If I could "erase" the computer's "memory" of ever installing 18.04 I think it might work.

TLDR, How do I do a clean reinstall of WSL Bionic Beaver on Windows?