Find the device with a yellow exclamation mark (often the or SFEP driver ). Right-click the device and select Update Driver Software .
: Alps Pointing Device driver version 8.100.2015.137 (Windows 7 64-bit) Alternative : Synaptics driver 19.0.9.0 if hardware ID shows VEN_SYN . sony vaio pcg-61a11u drivers windows 7 64 bits