Earlier quoted context omitted.
I use Win10 at work and the Calc app lags for like 10s when opening before I can type in it. I firmly remember it started to do that after some reboot update ...
The new calc app has always been a travesty. Taking at least a full second or more to load, with an obnoxiously large interface. The original calculator opened instantly and had a completely functional ui. I get angry every time I need to launch calculator on a machine I have not configured with SpeedCrunch. Almost better to use Excel.
Ouch! I hope you mean Excel 2010 or earlier; all the later ones are so slow to launch or open document that I tend to leave Excel and files (that I'll need to access quickly) open until something forces a reboot or until I bork Excel's state by QAing or triaging somebody's unfortunate VBA (sometimes even mine, too; shhh!). This remained true on a performant gaming computer while working from home. It was always a delight, remoting into somebody's machine that still had a functional Excel 2010 on it.