Aero Peek, scroll-wheel click/"click-and-hold" scrolling does not work

So, every once in a while I come across this strange issue:

1. Aero Peek suddenly stops working

When I hover my mouse over windows on the taskbar, the windows preview will flash for a fraction of a second and then vanish, if I'm moving my mouse along the taskbar the window preview will quickly "blink" (it appears and disappears) for as long I'm moving my pointer across that program's area on the taskbar, but nothing even remotely clear enough to see what's in that window. Once I stop moving the mouse, even while in that program's title area on the taskbar, i can't get the "blinking" effect to come back for that specific one unless I move my mouse off of it and then back on.

2. Clicking with the scroll wheel to scroll stops working

I like to scroll pages by clicking and holding with the scroll wheel, then I release when I get to where I want to be. But that functionality no longer works, nor does simply clicking once and then moving the mouse to scroll. When I try either of these methods, the small white circle with the arrows which indicate that you've clicked to scroll with the mouse wheel will flash on the screen for an instant then disappear.

What I've tried:
Restarting computer (works, but is a nuisance especially if I have a lot of tabs open in Chrome)
Ending every non-essential process in task manager, including explorer.exe and dwm.exe (doesn't work)
Disabling everything in Performance Options > Visual Effects (doesn't work)
Virus Scans (always come up clean)

There doesn't seem to be any sort of trigger which causes this to happen. I usually only notice that it's happened when I try to scroll in Chrome and it doesn't work, but a few times I've gone to open one of the other windows I have and notice that the preview for it didn't pop up when I put my mouse over it.

I've tried Google'ing it and I haven't been able to find anything similar to what I'm experiencing, and thus no solutions.

Clicking with the scroll wheel works as it should for other purposes, such as opening a new tab.

These issues never appear individually, only together.

System specs:
Windows 7 Pro x64
32GB RAM
50+GB free on C:/ and 100+GB free on D:/

Thank you for any help you may give, it's very much appreciated.

Well, played a round of payday 2 with a friend on steam. Went on the steam in-game browser during it and magically I could scroll again. Symptoms were gone after I exited the game as well