[Android Q&A, Help & Troubleshooting] IsReal8a:
Hi XDA community, since I don't have enough power to land this on other forums I choose here.

First, this is my disclaimer:

But come on, this is XDA, you will figure it out without problems.:fingers-crossed:

Second, the good thing about this is you only need 3 ingredients:

Old tablet, The HP Stream 7 tablet SPECS :p

Precious Disk Space :victory:

Sweet Internet :eek:

W00t? no USB or Keyboard required? Yes, that's why it took me a while to glue the pieces together. Now, here we go:

I suggest to download PhoenixOS (November Release v1.1.2-226), because it worked for me immediately, I have an issue with RemixOS that I didn't try to fix it yet, I got stuck on the "Select Language" screen, but the steps may work for you.

Now, free disk space on your tablet, I did the upgrade to Windows 10 a while back and I had almost 1GB left on C, that's ridiculous because the drive has 20GB-ish, so, I google (yes, you need to do your homework too because I did the steps on the fly) how to recover space from the greedy Windows 10 OS, I removed a lot of useless info/cache/downloads/apps/etc and even compressed the Windows binaries (yes, you can do that). Concerned about Windows performance? be not, it works faster than ever. After the next steps this may seem useless but free space is free space, you'll need it later on life.

After all that dark magic, I was able to reclaim 10GB-ish, yeah!, but then realized I had 8GB more on the tablet "lost", this is the recovery partition for Windows 10, now, this is something that you may think of because you can get rid of all that info and reclaim what is yours, that partition is for you, but maybe you wont so this is one of these life choices. I did, I don't care about recovery stuff, most of my gadgets have custom ROMs or OSes. Used Minitool Partition Wizard Free and managed to reclaim the precious Disk Space.

Important thing here, some users Shrink the drive C to create a new partition, I didn't, used the 8GB partition instead.

We have Disk Space available, now, we prepare the operations table:

Disable Bitlocker on the drive you want to install the new OS.

Disable Secure Boot, power off the device and press Power+VolDown for a few seconds until you're on the BIOS.

Boot on Windows and install the Android OS flavor you want, I'll split the installation in two because for RemixOS is harder.

NOTE: Remember that grub doesn't support touch and both Android OSes grub have Windows as first OS to boot and kids, there is the key.

PhoenixOS

Download the OS

Extract it and run the installer

Select install to Hard Drive and install it on the Drive desired (I did that on E: which is the 8GB partition).

Restart and let the system do the job, you'll land on Windows again.

In Windows, as you read on the NOTE, we need to change grub.

Open Windows Powershell ISE in Admin mode (yeah yeah, yo can use whatever you want)

Then execute the command

mountvol B: /s

With this you'll be able to see the contents from the UEFI partition

Now, remember to select view all files, with WPISE open the grub.cfg file located on

B:\EFI\PhoenixOS\

Put the Windows entry below the PhoenixOS entry, change the grub timeout to 3 or whatever timeout you want, this change is for faster boot, save the file and you're ready to go.

Restart the system, press Power+VolDown -> F9, Select the PhoenixOS, let grub do the magic and you win

Notes about PhoenixOS

Phoenix OS installation, straight-forward on the 8GB partition

Needed to change Grub but friendlier than RemixOS

Keyboard behaves weird, you need to be accurate when using your fingers

When using browser and playing videos the tablet heats up hard :)

Rotation is wrong, I selected not to use rotation so I can use the UI without problems

Is fast, Wireless work

Something I saw one time is it got stuck when showing my user recently booted, restarted the device and then it worked again.

Video after the break.

Veredict: It works for me and can play with Android in a tablet without the need to buy another.

RemixOS

It supposed to have more support for things but looks like PhoenixOS has more . Not going to start a war here, I always try to find what suits best for me :D.

RemixOS is a pain on this tablet with the newest November 2016 version, I need to play more and harder.

You do almost the same as PhoenixOS, the installer is easy as well but it shows you an installation issue the first time, you need to restart the device and try the installation again. After that it was a game of try and fail but I sorted out the pieces.

Restart and you'll be on Windows again, well, let the system land on Windows and modify grub, kind of same as PhoenixOS:

Open Windows Powershell ISE in Admin mode

Then execute the command

mountvol B: /s

With this you'll be able to see the contents from the UEFI partition

Now, with WPISE open the grub.cfg file located on

B:\boot\grub\

Remember to select view all files

Put the Windows entry below the RemixOS entries, save the file, change the timeout and you're ready to go.

For RemixOS you also need to change the timeout for the theme.cfg file on

B:\EFI\RemixOS\

Restart the system, press Power+VolDown -> F9, Select the OS Bootloader, let grub do the magic (after some errors, just let it be) and you win (see, no hands mom!), well, sort of because it freezes :silly:.

I'll try to do more tests with RemixOS and see what happens.

Is this guide enough for you, not? blame the Internet or leave your comments.

Enjoy.