security certificate errors.

[tilly75]

hi when i got to log into yahoo it comes up with a security certificate error and advises you not to continue. I ahve had this happen before on firefox and know there is a way to stop it happening as think is something on my computer not the actual security certificate- can anyone help me work it out? it only does on yahoo at the moment. thanks in advance.

[ChuckFickens]

Check your time and date.

[Dagman]

ChuckFickens is correct, Put your computer time and date right. I had the same prob for 2 weeks then my son sorted it in about 30 secs. I can't believe I didn't realise, I felt a right twonk.