The Logitech wireless mouse may well be what is causing the problem. Logitech mouse drivers seem to cause problems with GameMaker games in general, as far as I can tell; you might try switching to a wired and/or non-Logitech mouse and see what happens. Lowering the poll rate on the mouse may also help. I will keep investigating the issue.
That is drastically improved, though still very sluggish...that is so weird, this is the first time I've seen it drop in performance because of permissions. To further increase performance, you could try moving its directory over to your other drive, and also mess with compatibility settings by right clicking the exe file and opening properties. My computer thinks it should run in compatibility mode with Windows XP Service Pack 2, which is probably because GameMaker 8.1 is a dated engine at this point, though I have never had the performance drops you are facing.
Is the drive it is currently on a solid-state or regular hard drive?
Thanks very much for helping me troubleshoot it.
It's interesting, but I've recently started encountering this same issue. I didn't have it before, but it's a problem now. Not entirely sure what caused this to happen, is there some windows system tool I can use to see what changes I've made to my system (installs / programs / services) in the past 2 weeks?
My specs are the following:
Nvidia geforce 670
Intel 5820K
32gb ddr4
Win 7 64-bit
SSD + HDD
I've tried the game on SSD, but it doesn't seem to help. My current performance is similar/identical to that of the second video, and the game used to work fine 1-2 weeks ago.
You can certainly check Add/Remove programs to see the list of installed programs as well as checking Windows updates I believe.
You can also check what runs on startup:
Click Start, run
Type msconfig
You should then be able to see your startup entries, and what is/is not enabled and make desired changes.
You may get a notification that MSConfig was run at next boot-up, but you can just ignore that.
It is a game called Venture Forth.
http://store.steampowered.com/app/501310/
They did recently release a couple updates that have resolve the major performance issues. I don't believe it's a Gamemaker title though.