Windows Mail (Vista 32 bit) not downloading mail with large attachments

I have used Windows Mail for years with very few problems. I prefer to download all mail and then respond, file, delete, etc. About a month ago it seemed to "timeout" on me when trying to download Emails with large attachments (pictures, PDF files, etc). I can access thos Emails through Webmail and file them so they don't continue to try and download, but now I've go a good number of these "stuck" in my webmail.

What could have changed that has now prevented me from downloading these Emails through Windows Mail and how can I fix it? Thnaks for any and all info/advice.

Welcome
If you increase the timeout, you should be able to correct the problem
1. Open Windows Live Mail, go to Tools > Accounts...
2. Choose your email account and then click on "Properties"
3. Click on the "Advance" tab
4. Under 'Server Timeouts', drag the slider to change it to a more longer or maximum period of timeouts.

Probably caused by extremely large attachments, or internet slowing down. There are various sites to check the speed.
Speedtest.net by Ookla - The Global Broadband Speed Test
Be sure you are getting the speed that you were promised.