itch.io

Hi,

The [WinError 5] Access is denied error happens because the app is trying to create folders or write files in a directory where Windows restricts write permissions (such as Program Files or root C:\).

Here are a few quick ways to resolve it:

1. Change the Output Folder: In the app, click the SELECT button next to Output path and choose a user folder like Downloads, Documents, or Desktop.
2. Run as Administrator: Right-click the application executable (.exe) and select "Run as administrator".

Thanks tio you my friend :D

Hi my friend, 2026.2 just released! 

this fix that error :D

Hi my friend, 2026.2 just released! 

this fix that error :D

Hi my friend, 2026.2 just released! 

this fix that error :D

Hi my friend, 2026.2 just released! 

this fix that error :D

Hi my friend, 2026.2 just released! 

this fix that error :D

Hi my friend, 2026.2 just released! 

this fix that error :D

Hi my friend, 2026.2 just released! 

this fix that error :D

Hi my friend, 2026.2 just released! 

this fix that error :D

Hi my friend, 2026.2 just released! 

this fix that error :D

Hi my friend, 2026.2 just released!

Hi my friend, 2026.2 just released!

Hi my friend, 2026.2 just released!

Next week my friend

Hi my friend, have you tried the new 2026.1 version? it s full of improvements for your problem! :D

Thank you my friend ❤️

Hi my friend

There is a problem with this link because website files are not indexed correctly 

i will fix in the next release :)

haha do not worry my friend :D

Hi my friend, 
QualityScaler has more AI models and receives updates sooner

Clicking on "Check" button controls if:

- the link you entered is correct

- if the app can reach fapello website

- and how many file the app found for the link

Hi my friend, 

before starting the download, did you click the “Check” button? Make sure the app can connect to the fapello.com website properly.

Have you also tried clicking the “Connection Tips” button? It provides suggestions to help the app work properly.

Hi my friend, without admin privileges on some pcs the app can t save downloaded files

Hi my friend, don t worry about me, i am here to help!

yeah maibe the driver is problematic, lately NVIDIA GameReady drivers haven't been very stable and have a number of issues; you should try the ‘Studio’ drivers, which are much more stable.

Have you also tried setting the multithreading value to different numbers (2 or 4) with RealESRGANx4 ?

This happens with all videos? or just one in particular?

Hi my friend! 

That's a beast of a setup! A 5090 with 96GB RAM should handle almost anything, so let's figure out why it's tripping.

To help me investigate the crashes, could you please provide your full specs and QualityScaler settings? Specifically:

• OS: (e.g., Windows 10/11)
• CPU: ?
• GPU Driver Version: (important for the 5000 series)
• AI Model used: (RealESRGANx4 or others?)

• Input File Type: (Video or Image?)

In the meantime, testing with AI Multithreading OFF is a great first step to see if it's a synchronization issue. 

Looking forward to your details!

Hi my friend, 

this happens with specific link? or specific files?

Hi my friend,

Unfortunately, yes, RealESRGANx4 has been temporarily removed in version 2026.1 because it is not properly supported in the current version of the AI engine (required for the two new models introduced).

It will be reintroduced 100% with 2026.2 along with the AI engine update (expected in March 2026).

In the meantime, I recommend using BSRGANx4 (very similar to RealESRGANx4 in terms of quality)

I apologize for the inconvenience.

Hi my friend, 

It has always been this way, it only happens with those two antivirus (which I am not personally familiar with).

I also contacted the two companies to resolve this issue, but they did not respond.

Hi my friend, 

from version 4.6

Administrator Permissions Required 🔒

⊡ QualityScaler now requires administrator permissions to work

⊡ This change fixes a bug that was preventing access to the DirectML library on some PCs

⊡ Without access to DirectML, the GPU couldn't be used correctly for AI upscaling

Hi my friend, 

from version 4.6

Administrator Permissions Required 🔒

⊡ QualityScaler now requires administrator permissions to work

⊡ This change fixes a bug that was preventing access to the DirectML library on some PCs

⊡ Without access to DirectML, the GPU couldn't be used correctly for AI upscaling

Hi my friend, 

This occurs when the image exceeds the memory limit selected in the GPU VRAM widget.

This value is set to 4 by default. 

You can increase it if your GPU has more than 4 GB of RAM, and the problem will disappear

Honestly, it doesn't seem like an ARM compatibility issue.

Did you extract QualityScaler.exe from the zip file? Maybe extract it to your desktop.

Are you running the app as an administrator? (Right-click > Run as administrator)

Hi my friend, 

never tested compatibility with Windows on ARM, what kind of trouble?

The error happens only with images?

Hi my friend, 

In what situation does the app crash? When starting up or while downloading?

Have you tried running it as an administrator?

Hi my friend,

i will give a look, thank you!

Thanks to you my friend :)

Hi my friend, 

sorry for the problem, i will send a report to Microsoft, there are no trojan in the zip.

I scanned the .zip and the .exe with VirusTotal finding no problem :(

https://www.virustotal.com/gui/file/4a124fba216e83f146e2431366ab4c0daa31a00419c1...

Hi my friend, 

I'll take a look at this issue, thank you very much :D

Hi my friend :D
Thank you!

Nvidia 1660? 

No specific advice other than the general tips provided in the app by clicking on the blue “?” buttons.

For videos, use “RealESR_Gx4” and “RealESR_Animex4,” which are the fastest models. For images, feel free to use whichever model you prefer.

thanks to you my friend :D