Audio: no audio output device is installed

Issue: So i got this thing today, and had been trying to fix it for hours, it's audio device not installed - an X next to the volume tray - but it actually is, i have tried uninstalling it and re-installing, disabling then enabling, and much more but none worked.

Audio drive: Realtek hd audio

Pc: laptop toshiba, satellite.

Other: i have gotten an error about memory could not be written when testing some audio.

i hope you could help me fix it, and thanks.