All of a sudden, my audio files sound alot thicker and slower!

[Computer1234]

i was listening to music and i restarted my browser because browser was taking to long to open and bitdefender stopped responding. then after again i reststarted again same problem. now its fixed i open my mp3 files and all of sudden everything sounds completely different

the same problem occoured gain with my browser and antivirus the whole computer seems to be laggy then my audio got fixed back to normal when i restarted it but how does it alter the sound