Help with Email links in Windows 7 please

Hi

I am new to Windows 7 so please be patient with me, I am still finding my way around:

When I click on a return email link on a website: eg customerservices@currys.co.uk I get this message for Windows Explorer: Could not perform this operation because the default mail client is not properly installed. Is this the webpage error and a fault on their site or is it my email that is not properly installed? If I am in Ebay for exmaple and click on someones email address it immediately takes me to my send page? This makes me think it is not my email?

Any answers and pointers very much appreciated.

Thank you

Thanks for your prompt response. I use BT Yahoo Email

In order for you to click on someones email in ebay or other websites and opens up a window for you to start typing . You will need to install a local email program like outlook then you can point it or configure it to use yahoo , gmail , msn, hotmail...

Outlook comes with MS office

Sorry I do not use Windows Live or Outlook - I only use BT Yahoo Mail and wanted to use it as my default. I tried going into set programme access and defaults and it lists BT Yahoo and Windows Live. When I click on the drop down list and make BT Yahoo my default and apply, the next time I open it, it has gone back? Apologies again but this is new to me, in my old XP my default set to BT on its own.

I do have a windows live account but want my MAILTO client to be BT Yahoo if this helps? I just do not know hich boxes I should be crossing and ticking if that makes sense. When I click on a link I want my BT Yahoo Mail box to open? Can this be done? Thank you

Ok. You need yahoo mail plug-in installed. After that goto - control panel - internet options- program tabs- and choose yahoo mail and click ok

Thanks to all of you, your help is appreciated. The Plug in reslved my issue.:)

Starting with Kotix's regedit tip for gmail here and splicing in the way firefox treats mailto links to send them to yahoo in firefox's about:config, I logically derived that the answer is:
"C:\Program Files (x86)\Mozilla Firefox\firefox.exe" http://compose.mail.yahoo.com/?To=%1

After all the help i've gotten from people on the internet, it's nice to finally give something back!