What do you think /f /s
s is the user shutdown iirc (normally used on remote screens), /f is just not to ask to close programs.
And yes, though with newer Office versions.
It's quick, excel takes longer, but then it checks for update.
Win7 takes a while as win10 improved this process and you'll probably be sat on old harddrives.
Also if it's networked it could be copying profiles etc.
By the way, I'm not saying the Pi3 is slow, it's not with my decent uSD card it is fast, again the login is the longer process in all of it.and finding the button to click to open a spreadsheet.
My Windows10 on a Win7 era AIO Intel T4500 (a laptop style CPUs) and old mechanical.eco discdrives does take quite some time, but that's older than the Pi itself.
EDIT just did a boot up, from wherever my son shut it down from
then from shutdown /f /s (which logs the user profiles out)
That is from pressing the button on the case, going through BIOS (not set to it's fastest boot options iirc)
Windows loads up, spinning icon, checking it's update it needs to install etc
Clicking on my profile from the list, typing my pin code in, takes some time as it has the daft picture you need to get out of the way.
Clicking the Excel icon in the taskbar (not a habit as I don't use it often)
Excel Office 365 ProPlus opens I select blank sheet. (the longest part is probably me moving the mouse and clicking as it's not a habit)
But that's pretty fast in my eyes for everything it has to load, moving the mouse and typing takes time. I wasn't rushing, did it like normal. and moving between the stopwatch and back.
GOG, Steam, Epic, Skype all load in the background at some point.