You should have opted for the 3x. branch close, less CPU intensive.
However, it should not run this slow.
I'd suggest removing all Java and adobe flash/shockwave installs, reinstalling them and seeing if one of them is the culprit.
This is starting to sound like Java and it's 40 thieves, uhm, i mean, 40 installs hogwash from before it was bought by Oracle.
As for IE functions : different browser man, different keycombos.
Alt+s and alt+p doesn't do anything in my IE or Pale Moon (beyond making ß and ö symbols), so i'm wondering what you have assigned to that
