Bit Defender Scan is killing my CPU is this normal?

I'm getting very high CPU usage when I run a scan, it fluctuates but my PC is overheating and blue screening as a result. CPU gets to 99c.

CPU: 12th Gen Intel(R) Core(TM) i9-12900K  3.20 GHz

I had thought this was a problem with the hardware so I just took the whole thing apart, dusted, reapplied thermal paste, runs fine...until I try and scan.

Any tips?



  • Gjoksi
    edited May 2023


    Here is a screenshot from my laptop's task manager, while running Full System Scan in the background:

    Laptop: Asus X551CA

    Purchased: April 2014

    Specs: Intel Core i3-3217U 1.8GHz, Intel HD Graphics 4000, 4GB DDR3

    Hardware change: November 2018, 500GB HDD -> 120GB SATA-III SSD

    OS: Windows 10 Pro 22H2 64-bit with the latest updates installed

    But, must say that in my case it is pretty normal, since "Scan task priority" for System Scan and Quick Scan is set to "High", which takes much more resources (CPU, RAM, disk, power) than "Low" and "Auto".

    Open your Bitdefender program, go to Protection -> Antivirus -> Open -> Scans -> System Scan, click on the three dots ••• button on the right next to System Scan, click on "Edit", change the "Scan task priority" from "Auto" (default is "Auto") or "High" to "Low", click "Next" and "Save".

    Also, do the same steps for "Quick Scan", change the "Scan task priority" from "Auto" (default is "Auto") or "High" to "Low".

    If that didn't solve the issue, do the steps below.

    -- STEP 1 --

    Repair Bitdefender, by following these steps:

    -- STEP 2 --

    If the instructions from Step 1 didn't help, uninstall the Bitdefender program using the Uninstall Tool:


    It will completely remove the program.

    Next, reinstall Bitdefender from your Bitdefender Central account and see if the issue has been solved, as reinstalling the program usually solves the issues.

    -- STEP 3 --

    If the instructions from Step 2 didn't help, follow the instructions in this step.

    First, take screenshot(s) of the issue

    and create a log file on your Windows device using Bitdefender Support Tool, by following these steps:

    Next, contact Bitdefender Consumer Support by e-mail:

    with short description of the issue.

    After that, you will get an automated reply by the Bitdefender Customer Care Team, with your ticket number.

    Now, in reply to that automated reply, you can send the screenshot(s) you already took and the log file you already created in the first step.

    Since you are all done, just wait for the support engineers to investigate your issue and find a solution to fix the issue.

    Remember that the screenshot(s) and the log file will help a lot to the support engineers for better and faster investigation on your issue and finding a solution.