To disable 2- Step verification, visit the using 2-step verification page under your Google Account Settings.
- Sign in to www.gmail.com with your username, password and verification code if prompted.
- Click Turn off 2- Step verification.
- A pop- up window will appear to confirm that you want to turn off 2- step verification.
- Click OK.
If you used application specific passwords to authorize applications to access your Google Account, it recommends you to go back to using passwords rather than application specific passwords to access these applications. In this way you can revoke your application specific passwords so nobody else can use them. Visit the Authorizing applications and sites page under your Goolge Account Settings. Click Revoke for any application or device whose code you want to revoke. For each application that you revoked an application specific password, you will need to reauthorize the application by entering your username and password, as you did before you turned on 2 step verification. You might not be prompted for this information the next time you use the application as some applications will take longer to recognized that an application specific password has been revoked.