mac wont open secure webpages

[agrandhige]

all of a sudden my Mac will not open secure websites like gmail, facebook--basically anything that would require a login/password. regular sites like cnn.com still open. Additionally iMail can not download new emails anymore. I have rebooted, emptied the cache in safari, tried opening the pages in google chrome instead of safari, disabled parental controls, disabled IPv6 (read that somewhere). Our network is working otherwise, all the pages can open on other computers in the house. somehow my computer has been "told" not to accept anything over the network that requires a password it seems!? The only thing that has happened was 1)the network was down for a while 2)my daughter may have pushed a bunch of keys on the keyboard...
I appreciate your help.

 

[Cheryl]

Check Safari Menu>Private Browsing. If that is checked, just select it to uncheck it.
It could also be set to browsing off line.

As for Mail, did you check the Preferences>Accounts>Advance to make sure the account is active?

 

[Satcomer]

Check to make sure she didn't screw up System Preferences->Security, Firewall, System Preferences->Parental Controls, /Applications/Utilities/Keychain Access (there hunt in the menu items to Repair the Keychain and lastly test a new user account to see if it does the same thing.