I just did this real quick because someone was asking for help in the chatbox, I hope it helps some people, alt store has been updated to support windows 10 so this process is much easier now. If I missed anything or you need any help leave a message and I'll try my best to update the tutorial and/or answer your questions.
Download latest version of iTunes
Download latest version of iCloud
Go to altstore.io download alt store beta
Unzip files, move to desired location
Go to search, search for altserver, run as administrator
Plug device into computer, ensure device is logged into iTunes
Go to task bar press ^ look for alt store diamond
Left click on diamond, select install altstore, and install to your device
Alt store will prompt you to enter your iTunes information, this only sends the information to the apple servers it does not send it to altstore or save your info.
Alt store should install.
Go to Unc0ver.dev from your device and click open in altstore, install unc0ver
Run unc0ver jailbreak on your device, if jailbreak fails to apply re-run the jailbreak app until jailbreak is successful. Seems to me when this happens though the jailbreak can be buggy, I suggest making sure all apps are closed before attempting jailbreak and powering down phone if jailbreak fails to apply and trying again.