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exception errors like This connection is untrusted

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I am having another computer in which I am having most recent Mozilla Firefox version(25.0.1). It is most of the times asking This connection is untrusted even for genuine websites like gmail,yahoo,facebook and even mozilla too. I did not understood what is the problem. But actually I am also having problem with my cmos battery in that computer is that the reason or any thing???

I am having another computer in which I am having most recent Mozilla Firefox version(25.0.1). It is most of the times asking This connection is untrusted even for genuine websites like gmail,yahoo,facebook and even mozilla too. I did not understood what is the problem. But actually I am also having problem with my cmos battery in that computer is that the reason or any thing???

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Hello shokvaddireddy, Check you date and time it is set to up to date today and the year month and date everything should be in correct data in your system

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If your CMOS battery is getting empty then you need to replace this battery because the clock usually first start running slower and at a later time all CMOS data will be reset.

For the time you can consider to use an internet based time service if the correct time isn't kept after booting the computer.
You should be able to set this via the Windows Control Panel.