Colors look bad on the bg as a low bitrate

[S1LENCE]

Hi all! There's a problem with the colors in the background like this character on the back:
The colors on the back seem to be blurry because and looks like a bad bitrate and I don't know how to fix it.
On my phone the colors look good.
What could be the problem?

[Rainbow23]

Hi @S1LENCE
Welcome to HP Support Community. This is a great place to post questions find answers and tips.
Thank you for posting your query, I will be glad to help you.

I see that you are facing issues with background color on your HP Pavilion Gaming - 15-Dk0023ur.

Please run the updates from HP Support Assistant by following the steps listed below:
1. Download the current version from this webpage Link
2. Click on Updates and Messages to scan for new updates.
3. Review the list of updates. Updates with a yellow information icon are recommended. Updates with a blue information icon are optional.
4. Click the update name for a description, version number, and file size.
5. Select the box next to any updates you want to install, and then click Download and install.
You may also refer to the HP document to download and use HP Support Assistant by visiting this Link 

Let me know if this helps.
Take care and have a good day.

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[S1LENCE]

Hi, thanks for the reply, but I can't install hp support assisstant , it says unknown error: -2.