File Download - Security Warning...

[janzman]

...in my 'Links' I have the likes of Answerbank, Amazon, BBC, ITV Hub, E Bay and PayPal. When I open any of these links I am getting a window saying 'File Download-Security Warning,do you want to open this file, unknown file type'. I have to click 'open' and the file opens.
This security warning window has just appeared in the last 2 days and never before in 2 or 3 years, can anyone help as to why this should be and how to get rid of it. I use Chrome and windows 7 (64).

[mightymouse]

I am getting exactly the same thing....

[janzman]

thanks MM is Chico anywhere about. (other computer techys are available!!)

[mightymouse]

Any answers please?