PAS35 power down your computer and hold F12 while powering up. Run the diagnostics and any extended tests. If the hardware checks out you should try a clean install following my instructions below, doing so in the order I listed should prevent many software problems which you might be experiencing.
I have a windows 7 540s. I also have AT&T as my internet  provider.  I recently started noticing that when I would send my emails out to friends. I wasn't getting a, ( message sent)  to confirm that they were sent. Finally AT&T told me that the Internet Explorer 9 was the problem. They set up FireFox as my email provider so I wouldn't have the problem. Well I deleted the Internet Explorer 9 and I am now using Internet Explorer 8. I didn't like FireFox. I am now being told the Internet Explorer is not supported by Micrsoft. Would anyone know what might cause a problem like this or maybe there might be a fix for it. Any help would be appriciated. Thanks Again as always,
Internet Explorer 9 HELP!!!!!!!!!!!!!