The replacement hard drive arrived yesterday and I loaded Ubuntu last night. Fired up Thunderbird and Firefox after migrating my user profiles and almost all is well. My only problem is that Thunderbird isn't able to connect with any e-mail servers.
Troubleshooting, here we come.
Your Attention Is Required - NOW! - Virtually ALL my customers use - Microsoft Security Essentials on Windows 7 and - Windows Defender on Windows 8.x and Windows 10. A really BAD bug ...
1 month ago