*** This bug is a duplicate of bug 1003950 ***
https://bugs.launchpad.net/bugs/1003950
I have ubuntu 12.04.
I had this problem and found I had changed my startup applications menu a few
days before. To fix click on the start button in top right corner then select
to startup applications and restart your computer after changing..
make sure the follow boxes are checked:
Certificate and key storage
Gnome settings daemon
policykit authentication agent
SSH key agent
This allowed me to install my updates, open package manager and install
software from software center.
When I unchecked these 4 boxes I lost the root rights. After checking the boxes
and retarting they all worked fine.
Hope this helps.
RR
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https://bugs.launchpad.net/bugs/1000500
Title:
Update manager won't open when clicked
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