problem with antimalware service executable

[Pijamin]

 (I am Belgian, mind my not so perfect english).

hello, I honnestly don't know if this is the right subreddit but here it is. I built my computer 3 days ago and today i encountered some lags in game. so i went and checked and there it was, antimalware Service executable was taking 40% of my cpu. I need help, i really don't know what to do and it becoming unplayable. The things took up to 55% CPu usage and I've seen it rise to about 4Gb ram usage. All my disks are either brand new or formatted (I don't know if we say it like that but basically put on factory settings). I Did a full scan, nothing appears. I have all my updates done. I did try to put down my firewall, nothing changed. I did try to stop real time scanning for windows defender, nothing changed. I am really stuck here 

I don't know if it will help, but here's my pc build :

Ryzen 5 7600 
B650 eagle gigabyte
32gb ddr5 crucial pro 
1tb Samsung 990 pro 
1tb crucial SATA bx500
Rx 570 8gb (will change it soon) 
750w gigabyte 80+gold
 

[Average Nerd]

Does the problem reappear after a restart?

If it's just a one time thing, it might just be Windows having a moment of confusion, if it's returning, there's something wrong.

[TatamiMatt]

4 minutes ago, Pijamin said:

 (I am Belgian, mind my not so perfect english).

hello, I honnestly don't know if this is the right subreddit but here it is. I built my computer 3 days ago and today i encountered some lags in game. so i went and checked and there it was, antimalware Service executable was taking 40% of my cpu. I need help, i really don't know what to do and it becoming unplayable. The things took up to 55% CPu usage and I've seen it rise to about 4Gb ram usage. All my disks are either brand new or formatted (I don't know if we say it like that but basically put on factory settings). I Did a full scan, nothing appears. I have all my updates done. I did try to put down my firewall, nothing changed. I did try to stop real time scanning for windows defender, nothing changed. I am really stuck here 

I don't know if it will help, but here's my pc build :

Ryzen 5 7600 
B650 eagle gigabyte
32gb ddr5 crucial pro 
1tb Samsung 990 pro 
1tb crucial SATA bx500
Rx 570 8gb (will change it soon) 
750w gigabyte 80+gold
 

Is this a fresh install of windows?

[Pijamin]

1 hour ago, Average Nerd said:

Does the problem reappear after a restart?

If it's just a one time thing, it might just be Windows having a moment of confusion, if it's returning, there's something wrong.

No it's not a one time thing. It is a fresh install of Windows and it's appearing everytime I open my pc. It is even laggy on my desk. Not only in game.

[Pijamin]

1 hour ago, Average Nerd said:

Does the problem reappear after a restart?

If it's just a one time thing, it might just be Windows having a moment of confusion, if it's returning, there's something wrong.

Yes it reappears after every start. It is not a one time thing and it is even laggy while on my desk. It is a fresh install 

[Pijamin]

1 hour ago, TatamiMatt said:

Is this a fresh install of windows?

Yes it is. 

[Pijamin]

So I tried a lot of things and it turns out (at least for now) that it was AMD Radeon software. I uninstalled it and now it seems to be good. Hope it'll help someone in the future.