Looks as if your PC has higher security settings now - Have you installed or upgraded any programs on your PC recently?
For email you might read this - could be as simple as resetting IE
"To Reset Web settings
Open Internet Explorer.
On the Tools menu, click Internet Options.
Click the Programs tab, and then click the Reset Web Settings button.
Under Internet programs, verify that the correct e-mail program is selected.
Click to select the Internet Explorer should check to see whether it is the default browser check box.
Click Apply, and then click OK.
If you receive a message when Internet Explorer starts telling you that IE is not currently your default browser, click Yes to make it your default."
there's more advice here: