Compose a message.

Its seemes looks an silly questions,but I Try to Compose a Message onmy Email
account which Yahoo, but when I open my email and I could read it oK,but when
I would like to compose a message I can't it's frozen,I have MAcfee installed
on my PC,although I didn't happen before ,even with MAcfee was installed,can
anybody help. Also when I wouldlike to try to sign in for MS a warrning
message appear saying that the information well be redirected to unsecure
route,what this all about,and did (Alexa) on the IEhave relation to
that,thanks.
nas