Windows 10: Why does this keep showing up and how do i remove it

I have tried to remove this but i am not sure how, if i change the wallpaper it disappears but after a while will reappear? How do i remove it?

:)

 

Remove account

I suggest you backup your personalized files first before removing the account.
To delete an account, follow these steps:

1. Press WIN + X keys and click Command Prompt (Admin) from the menu.
2. Type the following command and press Enter. Replace test with the name of your sister's account. Code:

 

W10 search box shows suggestions - cannot be removed

Hello, after the latest Windows 10 update (from 20H2 to 21H2) the suggestions list in the Windows 10 search bothers me. Attached are 2 pictures of how it looks after and before the update. Is there any way to remove them? I already tried it with W10 Privacy, but without success. These are not app suggestions that can be disabled. The problem has occurred since the latest update, so it shouldn't be too familiar. One is before and one is after the update ("Vorschläge" means suggestions):

 

Best way to remove problem Malware

Hi There,

I am trying to remove a bundle of Malware without success.

There is a bundle of listed programs which I try to uninstall through the typical Control Panel effort, but they remain listed there:

Buenosearch Toolbar
MyPC Backup
PC Performer
Speed Test 127
UnknownFile

I was looking at this weblink which provides a 5 step process for Buenosearch alone:
http://malwaretips.com/blogs/remove-bueno-search/

Not sure how much certain guides can be trusted. One of the first things I read was to download Revo Uninstaller, and I've not heard of it so I'm not sure if it's trustworthy..........