CPU only showing 1 core and 1 thread yet its a quad core processor

[arjster894]

I use a i7 4790k processor; quad core, recently i have noticed it getting a lot slower so i decided to reinstall windows, completely wiping my entire PC.

This didn't completely solve the slowness problem, and when i go on task manager I've noticed only 1 core is being read (and 1 logical processor)

I installed CPU-Z to confirm this and it gives the same 1 core 1 thread response

What can i do to revert this to using all 4 cores? I have attempted resetting BIOS settings to default

Note : under bios it does show there are 4 cores, i have attempted to uninstall drivers and restart the computer but there was no effect

 

[PuperHacker]

Press window key+R and type "msconfig". Goto: boot > Advanced Options. Ensure the box "Number of processors" is unchecked.

 

[arjster894]

Press window key+R and type "msconfig". Goto: boot > Advanced Options. Ensure the box "Number of processors" is unchecked.

thanks a lot! it worked

 

[PuperHacker]

Glad I helped!