Just to keep this on somebody's radar (probably not Microsoft since they have ignored this issue for years and clearly don't give a flying #### about power users).
I have the same problem; Windows 7 moves and resizes all windows from my second and third monitors when I switch to a different machine on my KVM. Windows is up-to-date. All drivers are up-to-date. This never happened on Windows XP. It never happens on my Mac.
It never happens on my Linux machines. And I use all three [four actually :-)] on this KVM.
With Windows 7/8/8.1/10, it literally takes me five minutes to put everything back where it was when I switched the KVM (I keep a LOT of windows open at once). I've been looking for an answer to this defect for years, and have seen all the lame responses from
Microsoft (when they even respond, which is as rare as a 1909-S VDB penny): update your drivers; are you on a domain? (Eh???); buy a new KVM; replace your monitor(s). None of these are actually helpful, let alone practical. WINDOWS 7 IS THE PROBLEM.
As far as I can determine, the problem is related to EDID (Extended Display Identification Data https://en.wikipedia.org/wiki/Extended\_Display\_Identification\_Data), which most modern graphics cards and monitors support. NORMALLY, that is a great feature, especially
for things like laptops and connecting to video projectors. But some power users (like me), who know what we're doing, and/or use KVM's, televisions, 4k monitors, ... want the ability to set a monitor configuration and have Windows keep its grubby hands off
it after that regardless of what monitors happen to be attached or turned on at the moment.
This is like many other Microsoft 'features' that take choice away from the user. These users are your CUSTOMERS. Granted, the average user is as smart as a falling cow pie, and really good software makes their lives easier. As a developer, I know all too well
the temptation to think, "If it weren't for the &%#$* customers, this would be a great (job|product|invention|feature). WE are the people who are paying M$ to solve a problem. Pure and simple. If the 'solution' brings more problems than solutions, guess what?
Capitalism kicks in and people spend their money where they get the most bang for their buck. Hello, Apple? Hello, Linux? There's a reason these two OS'es have eroded Microsoft's market share to the degree they have. Sadly, I see no change to this trend in
the foreseeable future: M$ still produces [expletive deleted] [software|hardware] that only fools would fall for (I am not being fair to notable exceptions; even M$ gets some things right). The latest campaign for the Microsoft Surface tablet will go the way
of the Zune media player and Windows Phone. Too little, too late, and too messed up.
I BUILT AN ALTAIR 8800 (which ran Microsoft BASIC btw), bought an original IBM PC when it first came out (not because it was anywhere close to a technological advance, rather because I could see where the industry would go). I have had Mac products for years,
and have experience with more operating systems than most people have fingers AND toes. Windows has a lot of features, a lot of users, does a lot of things. And wastes more time and productivity than all other computer software combined.
I have started a list of things M$ falls short on, and this is just one of many, many things. Perhaps one day I will start a blog to publish my perspective on this and many other subjects, but until I retire from my $250/hour consulting job I'd rather spend
my time gathering chips (aka $$$). In the mean time, I curse Microsoft software daily+++.
Just a hint of what's on my list: One simple work around for this completely infuriating 'feature' is to run Windows as a VM under either OS X or Linux. Since they don't mess with your configuration except when you ask them to, using a KVM doesn't create this
inane problem. Oops. I gave away another [patentable] idea: ONLY RECONFIGURE HARDWARE WHEN THE USER ASKS FOR IT. Just how many man-millenia would THAT save if Windows didn't do an exhaustive scan for hardware changes on EVERY boot?