You're probably looking at the title going "Okay what? You say your favourite OS is 5111..." I will explain.

For a while I had a computer that I ran just for IRC usage. It ran Windows Neptune. I will go into further detail on why this was a horrible experience.

For the record, I used Neptune for 2 years. My dad's cheap and so he installed Neptune in place of Windows Me on my computer.

Computer Specs:
HP Pavilion Something....
3.02GHz Pentium 4
9800Pro 128mb (Yes. I have about a million of these)
Sound Blaster LIVE!

Drivers:

Shut up. I know what your going to say, "You really think you can get drivers to work on a crappy beta build like that?" Well..... I did. And it wasn't fun. I spent about 2 hours before I finally decided to strip my drivers of their "OS Check". Don't ask me how to do it. It sucked.

Applications:

mIRC: Every version after 5.82 would give me an error message and then BSOD
WinAmp: Worked fine with a really old version for 1999
AIM: Old version from 2003 worked just fine

For my web browser (yes I did some on there) I used a hacked version of Firefox 3 to run on it. Everything worked fine.

Problems:

CONSTANT CRASHES. I don't know if it was my hacked drivers or something like that. It would crash about every hour. This computer was used for about 2 weeks. It was a struggle to use. Surprisingly, Neptune was actually stable when it did work. I never actually had a problem besides it dumping out or giving me a BSOD.

Would I Recommend?

Depends. I think it'll work just fine if you can devote more time into polishing it. I know my dad ran an IRC server off of it for 3 years non-stop. It must be just fine. I think it was just my experience.

Well, it's interesting to run a server off a beta OS. Stuff wasn't meant for it, but worked.

Have any idea why it crashed exactly?

I suspect it was the modified drivers. I can only suspect as I am currently not running this machine anymore. It has Longhorn 4053 now. Ill be writing a review on it sometime soon....

What else could you expect? Though Neptune can be considered quite stable for a beta...

i dont think i have ever seen Neptune BSOD on me , i suspect your driver hacks are to blame

On my experience Neptune is just as stable as 2000 but it becomes quite slow when used for a long time.

Well I said that, didn't I?

It was actually really good and I did like it but the BSODing was annoying.

I like Neptune. It NEVER had the BSOD! But unfortunately,there was only one build.

There were probably other builds, but only this one leaked...

I had USB storage driver problems in Neptune.

My experience of Neptune:
In 2010 Windows Vista on my computer is crashed, so I try to install Neptune 5111.
Specs of my PC:
Core 2 Duo E6600 2,4 GHz
2048 MB RAM
GeForce 8800 GTX
320 GB HDD

Effects:
- when the HDD is formatted at 100%, i see a error likes "Can't continue installation".
- HDD partitions is crashed.

That PC is a little too modern for Neptune IMHO...

Might have to do with the drivers.....

Sorry to bump, but anyways.

Ive had a perfect experience with neptune. I ran it perfect on my old pc which was:

2GB Ram
AMD Athlon 64
Nvidia GEFORCE 256MB PCI Express card

I never had any issues at all, and was able to get the video card which required XP or better to work perfect. The only things I ever hated was sometimes it said it was not a valid win32 or whatever app.

Sounds to me like you were trying to run a 64-bit or a corrupted EXE...

Nah it wasn't corrupted. I installed the sims 2 on it, and it said that. But installing it on other OS systems it was fine. Plus it should of worked when The Sims 2 is compatible with Windows 98 and above.

It can generate that error trying to run 16-bit apps on 64-bit OSes as well iirc.

Windows 7 will say you can't run 16-bit programs on this versions of Windows.