Sometimes add-ons can cause problems.IE reset seems to have made it better. I have not seen a crash since resetting.
For the E-mail issue we will get another download as a check for malware to confirm if the e-mails are really originating from your machine.
Please download aswMBR to your desktop.
Double click the aswMBR.exe to run it
Click the "Scan" button to start scan
On completion of the scan click save log, save it to your desktop and post in your next reply