Not able to log in to Drupal site as other user I am a site admin (Drupal 7 - all updates are current) and am able to log in with my own credentials.  I'm working an issue and need to log in as another non-admin user.  No matter what I try, I'm not able to log in as this particular other user though I have verified their user email address and password.  I have copied and pasted their email address directly from their user account.  I have also reset their password so I know it is correct.  I have tried turning off clean url's (as suggested by another forum), but that didn't help.  I have cleared the site cache.  I contacted the user and she is able to log in/out and back in with the exact same credentials I'm attempting to use.  We have had this problem with another non-admin user on this particular site but it hasn't happened in quite a while and never with this user.  I have logged in as this user prior to this happening but it has been a few months. 

I saw another post on this site about the same thing but didn't really see a solution (Cannot log in to Drupal site).

Does anyone have any ideas?  This is quite an inconvenience.
Once I was able to get in touch with my other site admin and she was able to log in with the same credentials I knew the problem was local.  I had tried different browsers.  I flushed my DNS and rebooted my computer and was able to log in.