ZC's issue though may be bad downloads due to bad connection not just slow but corrupted by static etc. That can cause havoc because it also corrupts updates.
It’s actually fairly obvious when one device is getting low batteries, out of the Logitech gear. The interference is major and noticeable as skittering cursor on the mouse and dropped keystrokes on the keyboard. The Kensington keyboard just loses keystrokes to itself before going dead, but isn’t affected at all by the other three devices no matter how they’re doing.
I had a wireless keyboard and mouse do that straight out of the box with fresh batteries. The cursor acted like it had the DT's even set as slow as possible and the keyboard wasn't working right either.
If everyone else can get it to work and using remote access works also but the computer is going crazy after disconnecting from remote access that IMO points to mouse or keyboard simply due to the fact that is what changed when it stopped working. It could be internals of mouse or keyboard causing issues believe it or not including causing the RFI from it's internal components. Even wired mouse and Keyboards can go bad and do havoc.
Quite possibly you’re right. I don’t run 8 so I can’t even begin to address that, and corruption could account for a lot. I’d even wonder about the hdd...a chkdsk might be in order, as odd as that idea sounds.
Just doesn’t seem quite like any of the behaviours I’ve seen from a broken mouse or keyboard before, which is saying a fair bit...the whole reason I went full wireless was the sheer number of destroyed mice and keyboards, between awkward setup causing extra wear and tear, accidental damage from the cats, and just cheap crap wearing out.
None of this seems quite characteristic. If the cables were failing, there’d be the sound I mentioned. If the keyboard was failing, usually there’s a key or region of keys that noticeably misbehave. With the mouse, depending on what fails, you see the light out on optical, or you see the buttons work but not tracking, or tracking but no buttons, or every button but the one wearing out, etc.
It’s well worth borrowing a set to test with, or even buying a cheap set and keeping them as backups. I’m just not totally convinced it’s the only cause...this feels like it might be one of the bizarre outliers.
The reason I seconded the idea of getting the telephone wiring inspected is I have issues myself when it’s raining and the wind comes from a certain direction...part of where it connects at the roof is worn and when it’s wet, the phone becomes very noisy and connection slows down to about 1/4 of its usual speed.
Honestly, I think it’s 2 problems, or a zebra...just not the same zebra you’re looking at.