High Cpu Usage even after uninstalling LMMS

[hamster835]

so few days ago i pirated gta sanadreas from oceanofgames and i actually had to turn off my windows defender to run the app..i didnt play the game soon after i uninstalled and turned on my defender and scanned my system i found nothing..i dont think it had any harm...but next day i installed LMMS for the first time and i unistalled bcuz i panicked when i say my cpu was at 60% usage...everything went fine but soon after i saw my firefox browser is using 70%-80% cpu i got scared by the thouhght if i installed some minning app thats running in background..i uinstalled firefox..BUT IT STILL SHOWED IN MY TASK MANAGER THAT FIREFOX IS USING 70% OF MY CPU i rebooted the pc couple of times...i switched to chrome to see if that happens..but it did happen..but i figured out how to stop the process i just ended that chrome process manually in the task manager then everything went normal...i am too scared of these pc problems i have a ptsd u can say for these kinda stuff...its my new pc its kinda sad to see these kinda bugs...pls can somone help me with this.This is the best pc i have ever had i dont wanna have these problems

[Monospace]

Don't use a Windows, ideally. I suggest a Linux.
Also, this isn't an LMMS problem, this is a computer problem. Why don't you ask your friends for help? They will definitely help you with your issue.
LMMS doesn't give 60% CPU usage, you can install LMMS again. Don't worry; LMMS is a very lightweight app and consumes little to no CPU power most of the time.
Eitherways, we'll try to help.
Give us a screenshot of what is happening in task manager. You can take a screenshot by using Win-PrintScreen or Win-Shift-S, then upload it in a website like google drive, imgur, or pasteboard. Then share the link.

[Gps]

We first need to find what process is causing this high cpu usage, so do as Mono space suggested please.

Changes of something left over from that pirated gta install are 99%.

Its too late now, but you should never download any software from sites you cant trust.
Furthermore, if any software wants you to disable windows defender, you should always stop the install right there.

Only download LMMS from this site:

https://lmms.io/download#windows

[musikbear]

i uninstalled and turned on my defender and scanned my system i found nothing..i dont think it had any harm...but next day i installed LMMS for the first time and i unistalled bcuz i panicked when i say my cpu was at 60% usage

Harm?
Oh yes it did some harm.
You are most likely part of a bot net now!
That bot net can do everything you can imagine, and a few things you cant.
Your best chance is to make a roll-back. depending on how long ago it is that you made a restore-point, you will loose data!
A roll-back is not even a guarantee that you will be rid of the mal-ware, but its the best i can think of
Read: https://support.microsoft.com/en-us/win ... b5a3024da5
.....and stay away from dubious sites!

[Monospace]

Just do an antivirus scan. Windows Defender should be ok for anything serious enough.