Hello nytcpa, welcome to the Microsoft community, my name is Bruno Leonel, an independent consultant and I would be happy to help you.
Advance System Care is technically not a virus. It is more appropriate to be called a PUP (potentially unwanted program). Its nature can be as aggressive as a computer virus, but it is never replicated after it is installed on the PC.
Step 1: Initially, press the Ctrl + Shift + Esc keys to open the Task Manager. In the Details tab, find the line diskdefrag.exe, click on it with the right mouse button and then click End Task
Step 2: Uninstall Advance System Care from Windows
1 In the Windows Start menu, type Uninstall in the Search field. Select Apps and features from the list.
In the next window, look for the "Advance System Care" item in the list and then click on Uninstall button.
3 Quando solicitar confirmação, clique em Desinstalar para começar a excluir Advance System Care do sistema operacional Windows.
Step 3: Remove the remaining items from Advance System Care with Malwarebytes
Download and install Malwarebytes
https://www.malwarebytes.com/mwb-download/thank...
Click the Scan Now button on the scanner console to ensure that it completely checks the PC for any presence of Advance System Care and other forms of threats.
Malwarebytes Anti-Malware will issue a list of identified threats. Check all threats and remove them from the computer.
Step 4 Uninstall secondary programs
First, open the Control Panel and go to Programs and Features. In the list of software installed on the computer that appears, check for the IObit Uninstaller and Surfing Protection programs. They are offered at the time of installing Advanced SystemCare. If they do, uninstall both before proceeding to the next steps.
Step 5: If you have browser problems
How to delete changes made by Advanced SystemCare in the browser
Advanced SystemCare makes some changes to your browser settings that can be manually reversed after uninstallation. First, open the browser extensions page and disable or remove the Start Page 2.0 plugin. Then, delete cookies and browser cache.
I hope this helps, feel free to post again. We will be ready to help!