avrdude.exe: set SCK frequency to 93750 Hz
avrdude.exe: warning: cannot set sck period. please check for usbasp firmware update.
avrdude.exe: error: programm enable: target doesn't answer. 1
avrdude.exe: initialization failed, rc=-1
avrdude.exe: AVR device initialized and ready to accept instructions
avrdude.exe: Device signature = 0x000000
avrdude.exe: Yikes! Invalid device signature.
avrdude.exe: Expected signature for ATMEGA8 is 1E 93 07

avrdude.exe done. Thank you.