The "Rtk" prefix stands for Realtek , a Taiwanese semiconductor company famous for making audio chips. The "Vac" stands for Virtual Audio Cable . This .sys file is a kernel-level driver ( .sys files are system drivers). Its job is to allow software to record the "Stereo Mix" or "What U Hear" output of your sound card.
3 minutes If you are digging through the C:\Windows\System32\drivers folder on your Windows 7 32-bit machine and stumbled upon Rtkvac.sys , or if you are seeing a pop-up error about this file, you are in the right place. Rtkvac.sys windows 7 32bit
rtkvac-sys-windows-7-32bit
However, if you are getting Blue Screen of Death (BSOD) errors mentioning this file, it is likely a driver conflict specific to the memory limits of 32-bit systems. Reinstall your Realtek drivers before assuming it is a virus. Have a legacy Windows 7 PC? Let us know in the comments if this fixed your audio issue! The "Rtk" prefix stands for Realtek , a