I got a new Lenovo G50 laptop (Windows 10) recently and I have Thunderbird installed. The program works perfectly but on opening Thunderbird all the text in the program windows looks fuzzy. As soon as the mouse cursor is rolled vertically downwards over the panels, the text clears and remains so for a a few moments then becomes fuzzy again. It's not a huge problem but I'd be interested to know if anyone else has come across this anomaly and if, indeed, there is a solution to it. I've used Thunderbird for many years and I've never had a problem with it. Thanks in advance,