Is it an integrated sound card? If so, you can search for AC97 sound card driver in the driver's home, download and install it. Need for speed 12 requires a lot of hardware, so don't turn on special effects next time you enter. CPU utilization 100%, the possibility of virus is not ruled out. Antivirus method: Press F8 to select safe mode when starting the machine. After entering the safe mode, use anti-virus software with the latest virus database to carry out comprehensive anti-virus, then restart the computer and run in normal mode. Hope to adopt!