I've been using 32bit Thunderbird portable on a Win7SP1+ x64 system for years, running off a Sandisk Extreme Pro USB flash drive (essentially a USB bridged SSD, not a slow storage media at all). For quite a while, a simple version update, say a ~5MB download, takes a long time, like over a minute. I eventually just decided it's quicker/safer to copy the T'Bird portable folder over to an SSD, run T'Bird from that to do the update, then copy it back to the Sandisk Extreme Pro. That seems really odd and if anyone knows what's up with that, I'd gladly like to know. However now, the past update (I always update to latest version) and this update, something strange happens. It states an update available, or i put it off and later click Help>About Thunderbird to click the update button, and it downloads it, then I click "Restart to update thunderbird", and it closes, and a very brief updating window box is present (states Thunderbird is installing the update, or something to that effect, see attached screencap), with the update bar not moving at all, so within about a second, that update box closes and T'Bird starts, and has not updated, still on (as of right now), version 102.9.1. If I then repeat the above, clicking Help>About Thunderbird, it again presents the button to click "Restart to update Thunderbird", so I click it, and same as above, keeps failing to update. There is no error message. I've repeated this process multiple times and it won't update to 102.10 that it had already downloaded. I also tried toggling the setting "Use a background service to install updates", to turned on (was turned off by default?), but every time I restart T'Bird, it's off, uncheckmarked again. Attached is that update box with the bar that never moves, just appears for a second then T'Bird is running without having updated. The extreme slowness updating running T'Bird from the flash drive has been ongoing for a long time but this failing to update at all is something new for the last 2-3 versions at most (AFAICT).