Facing issues with logging in Quicken is always daunting experience. Now, login issues are generally caused by arrays of possible errors. There could be more than one error. Thus, it is not always easy to judge the actual reason for login error or problem. Primarily, you should carefully enter your login username and password. Check the caps lock setting, and turn it off in order to avoid capitalization error. Issues with Quicken login can also be caused due to hacking. Hacker may have change login credentials of the software. Call customer support center in such cases. They will provide you step by step guidance on recovering your account.