Windows 10: Help! CPU usage stuck at maximum, everything I've tried doesn't work.

Basically every program is using my CPU too much, which has caused my pc to slow down tremendously. Even if I end a task that is using a lot of my CPU, another task begins using it. It has slowed down my PC to the point it is unusable. Can anyone help me out?I have tried DISM and SFC, also have done a malware scan.

:)

 

hd6950 to hd 6970

ok
i ve tried everything:with atiflash from dos,winflash.step by step with bios powercolor hd 6970 from the database.
nothing,doesn´t work.any suggestion????

 

100 percent CPU usage from nothing

Hello again,
I am reopening this subject as the CPU came back with its high usage!
I have tried to do the steps provided again, but doesn`t work!
Any other ideas? Thank you!

 

CPU Maximum frequency stuck at 22%

I've noticed my Dell Inspiron 5570's CPU usage in task manager has been stuck at a very low number, around 10 - 20% recently and as a result is slower than usual to the point where even simple applications such as Youtube take minutes to load if they manage
to. I found the cause to be the CPU maximum frequency to be 22% at all times according to the resource monitor. My brother's laptop's maximum frequency fluctuates between 80 and over 100%, and so I presume this is what should occur. To fix this, I have tried:

- Restarting the computer

- Taking out and reentering the battery

- Updating Windows

- Setting the power plan's minimum and maximum CPU usage for on battery and plugged into 100%.

- Create a new power plan with 'high performance' and 100% minimum and maximum CPU

- Uninstalling and reinstalling the Microsoft ACPI Compliant Control method Battery

- Checked the temperature which appears to be normal

Any help would be greatly appreciated

Tl;DR My laptop's CPU usage won't go above 22% even though the power plan tells it to

Sorry for my English