You'll need to unplug the gridseed from your computer usb, disconnect the power cable from the gridseed for about 30 seconds, plug it back into power, reconnect the usb cable to your comp. Go to this webpage,
http://www.eyeboot.com/drivers , download the modified cpu miner for the gridseed and the correct driver for scrypt mining or the zadig driver if you will be using the sha-256.
Eyeboot has a very good installation video on youtube. If you follow his video step by step, you will be mining with your gridseed in about 5 minutes. Good Luck, Chris B.