Thank you VERY MUCH for suggesting ChatGPT, I was finally able to solve the issue but not by updates as my system was already up to date. ChatGPT gave me another solution which worked immediately after a few days of searching for a solution till I was completely desperate.
The solution was as follows:
Use PowerShell to enable Core Isolation. Open PowerShell with administrative privileges and run the following commands:
"Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V-All
Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Control\DeviceGuard" -Name "EnableVirtualizationBasedSecurity" -Value 1
Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Control\DeviceGuard\Scenarios\HypervisorEnforcedCodeIntegrity" -Name "Enabled" -Value 1"
FYI the first command gave me an error, but I did not need it anyway because I already had the Microsoft Virtualization feature enabled. (I already had core isolation active earlier and then I disabled it to install Huawei HiSuite to backup my Huawei phone and its drivers are not compatible with core isolation, but after I finished and tried to reenable core isolation it wouldn't no matter how hard I tried to remove all Huawei incompatible drivers)
I must inform you though that after applying this method, I am unable to disable the core isolation directly from the settings, it says now that this setting is managed by the administrator (I am the administrator though)