This is the English version of this post.

Take a look at the screenshots (e.g.) and try to figure out by yourself. Do not ask again please.

1. Close this wallpaper & WE.
2. Remove "HKEY_CURRENT_USER\Software\Project-AZUSA" in your registry.
3. Go to "C:\Users\{YourUserName}\AppData\LocalLow\Project-AZUSA\NekoWallpaper\" and delete all files which don't have an extension (e.g. NekoSave). If you can't find that path, try "%APPDATA%\..\LocalLow\Project-AZUSA\NekoWallpaper\".

It may caused by low privileges. Try:

0. Firstly, just rapidly click on desktop for some times and hope it works.
1. Find Wallpaper Engine path, usually X:\...\Steam\steamapps\common\wallpaper_engine
2. Set wallpaper64.exe, wallpaper32.exe and launcher.exe to run as administrator
3. Restart Wallpaper Engine
4. (Optional) WE Setting->General->Misc->Click "Set high prioirty".

If you still have similar problem, check your anti-virus software(even Windows Defender) and add WE and this app to whitelist.
Also try update your (graphic card) drivers.
Also try to close any desktop tools or gadgets.

Enable and turn up sound in Character Panel. Update your audio card driver.

Wallpaper Settings - Performance - Playback - Other Application playing audio: set it to "Keep Running".
Please update your audio card driver.
If you're using a MSI computer, try to disable Nahimic related services.

Try set mouse polling rate to a small value.

In WE Settings, try to set wallpaper "Keep running" instead of "Pause".

Read Mascot Instructions, if that doesn't solve your problem, suggest me to remove this feature.

* Select a cat in Character panel.
* Click "Reset Position".
* Click "Manual Save" and restart the wallpaper.
* Clear all settings.
* Check if your anti-virus software had deleted our files.

Windows 8/10's new scale(DPI) setting would cheat our app by giving us fake resolution. For example, if your real resolution is 2000x1000 and set scale to 200%, then we might got a 1000x500 resolution. In that case, your picture is scaled to half of the screen size. But still you can use the slider on top-right to resize.

That's because this is an application wallpaper, so you have to check it's safe by yourself. The warning doesn't always means the wallpaper is actually unsafe. It just shows on every application wallpaper. You may have to check again after this wallpaper gets updated.

Firstly, adding models needs time because the models need to be processed (e.g. add some animations).
Secondly, I might get banned by $@%#&^

So let's see how far we can go...

Those parts are not drawed at first - in original game, since you don't have any chance to see those parts in such a galgame.

Neko series don't use Live2D. They use Emote since it works better on krkr engine (since M2. mainly develops krkr games).
In fact Live2D is more open and active, with a better editor, while Emote editor is (also) made using their "powerful" krkr galgame engine and of course, it's hard to use.

If you want to play with Live2D, there is an analogous Live2D wallpaper. It's NOT developed by me, and it has "run out of beta", "releasing on time" and ready for sell in near future. Here is the free version: Live2DViewerEX Lite (There is a full version in Steam store.)

It may caused by Unity, in fact I have no idea about the exact reason, but Unity seems doesn't like to be launched at system initialization time. Pink is the error color of Unity when it failed to load the shader. If you have a solution please tell me. For now I recommend you to set the windows service of WallpaperEngine to "Delayed (Start)". It still has risk to crash on some circumstances.

Yet another problem caused by Unity, this time with WE. Conclusion: Unity does't like you staring at other hot (I mean full-screen) girls when she is running. If you did, she crashs. I think it may caused by:
1. Your game takes too much VRAM so we don't have enough for our rendering.
2. Full-screen games (except borderless window) will try to set your screen resolution, which is fatal for Unity. You can try switching screen resolution by yourself and Unity also crashs. Besides, I tested with osu! on borderless window full-screen mode and our wallpaper didn't crash.

It's a hardware info collection service by Unity, and it can't be disabled unless I paid Unity for a pro version which is too expensive for me.
Since 2018-11, we enabled another service by Unity - Unity Analytics telemetry to collect anonymous crash data. This will help me fix potential bugs and let me know my active user count, to decide if I should spend my poor limited personal time a little more on this.
If you really care about it, just block it from accessing internet with your firewall.

This wallpaper is unable to port to Linux for now, but you can try to run it on Linux via Wine. For detail see @Wizard30's attempt.

If you're asked to send log file to me, find "C:\Users\{YourUserName}\AppData\LocalLow\Project-AZUSA\NekoWallpaper\", there are some ".log" and ".txt" files, find them and send them to me via email.