Plutonium

Whenever I play my audio keeps cutting in and out every few seconds. Not just ingame but outside audio too like on chrome. Not sure what's causing this but any help is appreciated.
I'm using xm4's over bluetooth and have them selected in game

still haven't worked it out.
have tried running launcher with windows defender off,
the only thing i could see messing with it would be riot vanguard that i've also stopped but still no luck there.
don't have any other anti virus or apps running in the background that would affect this so not sure what to do there.
i had this running a year or two ago fine on this same computer, obviously things change since then but yeah not sure what.

Resxt i only have windows defender and ccleaner for security, and no other programs for antivirus or software that changes processes.

Can't open the launcher at all, any time I go to run it comes up with this error "Self-protection failed. Error code: 4".
Have deleted all old versions of plutonium and downloaded the redist stuff but no help there.
Have tried turning off anti-virus and downloaded the launcher again but still nothing.
Any ideas on what's causing this and how I can fix it would be great thank you.