Hello @Aaron Naser
First of all you can run a antivirus full scan on your computer using the Microsoft Defender Antivirus on your computer.
Steps:
Open Start on Windows 11.
1.Search for Windows Security and click the top result to open the app.
2.Click on Virus & threat protection.
3.Under the “Current threats” section, click on Scan options.\
4.Select the Full scan option to check the entire system for viruses and any other type of malware.
5.Click the Scan now button.
Additionally, my comment in case it appears clean, is because most of malicious software on your computer will be removed once partitions are deleted and system is installed over the old data. My suggestion to explain the abnormal behavior would be:
A) Windows 11 is still installing some updates in the background after the 1st time boot.
-The best option is to leave it on for some time, but you can always expedite the process by going to the Update section of your Windows Settings.
B) Some drivers may be automatically installed by Windows installation but may not be the most efficient version of the drivers. I would recomment 2 options:
1.From the Update section of your Windows Settings, select View Optional Updates and select Drivers and Firmware to install updates
2.Check on the computer or devices manufacturer for updated BIOS, Firmware or Drivers for the devices of your computer (Motherboard, Chipset, GPU, CPU, etc...).
Hope this helps with your query,
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