I love the ability to change volume by scrolling on the mouse wheel. However, it doesn't seem to work when I scroll on my trackpad.

If possible, why not use the new windows 10 volume slider

which is very pretty, instead of the old win7like slider.

Give a configurable keyboard shortcut to toggle between only running programs on the taskbar. This shortcut should directly switch like Alt+Esc does (unlike Alt-Tab which shows a preview window) but it should switch in taskbar order of running programs from left to right (or right to left if Shift is held down). From Windows 95 to XP, we had Win+Tab (Win+T in Vista), then hit Enter to cycle only between running programs. As Windows 7/8 both mix running and non-running programs, Win+T has become useless. If I use Win+T, I have to go through all the pinned programs before arriving at a running program. We have Alt-Esc which switches directly but in Z-order (order by last used which is unpredictable, not the taskbar order which we always see at the bottom). Alt-Tab is there but it is not the Taskbar order. Plus Alt-Tab doesn't directly switch, it shows a list where switching does an unwanted Aero-Peek and where minimized windows are thrown at the end of the list.

7+ Taskbar Tweaker Could not load library (1004)

Library initialization failed, perhaps your Windows version is not supported

I can see other reports for older versions, but nothing recent - so here it is again.

7tt v5.9

Windows 10 Pro (64) build 2004

Happens on boot - no other special requirements to reproduce.