So my PC recently has been acting strangely. My newest problem that I haven't been able to fix on my own is that whenever I move my mouse, my PC lags as a whole. When watching a video, the video stutters (but the audio is fine). When loading a webpage, moving the mouse causes it to freeze then appear after I've stopped. When moving across the icons, the highlight lags and doesn't appear unless I've stopped moving or slowed down. The biggest problem is when playing games using my mouse, the game chugs and stutters. I've confirmed that this is not a problem with the monitor because my FPS meter shows that actual frames are dropped when moving the mouse (it dips into the 20's and 10's just by looking around). However, just moving with WASD a and turning and such causes no lag.
I've tried all the basics and then some. I switched USB ports for my mouse, tried a new mouse, restarted my computer, turned it off and unplugged it for a bit, updated my USB drivers, updated my mouse firmware, updated my graphics card driver, updated my BIOS, ran a defrag (I ran the defrag for a different issue but it didn't help regardless). I don't know, it's strange.
I should note that the problem started after installing AI Suite 3 from the Asus website (since I lost the disk). The program, however, had tons of errors, crashed a lot, generally didn't work, and used a lot of my CPU when it wasn't even running, so I uninstalled it. Shortly after, my C drive was running 100% of the time and everything on my PC slowed down. I ran the defrag I stated above and that fixed it, but then I noticed the issue with the mouse, and have been trying to fix it for 3 days.
My specs are:
Intel i7 6700k
ROG 1070 Strix (driver version 384.76)
Asus Maximus VIII Hero (BIOS version 3401)
16gb DDR4 Ballistix
Windows 10 w/ latest updates
Generic 1tb Seagate HDD for C:
Logitech Proteus G502 Gaming Mouse