I think what happened here is that something went wrong and messed up the permissions of some of the users files. MS help suggested that he login as an administrator and reatore the intended permissions.

I don’t work with Windows boxes, but see a similar situation come up often enough on Linux boxes. Typically, the cause is that the user elevated to root (e.g. the administrator account) and did something that probably should have been done from their normal account. Now, root owns some user files and things are a big mess until you go back to root and restore the permissions.

It use to be that this type of thing was not an issue on single user machines, because the one user had full privileges. The industry has since settled on a model of a single user nachine where the user typically has limited privileges, but can elevate when needed. This protects against a lot of ways a user can accidentally destroy their system.

Having said that, my understanding of Windows is that in a typical single user setup, you can elevate a single program to admin privileges by right clicking and selecting “run as administrator”, so the advice to login as an administrator may not have been nessasary.

No. It is the equivalent of a PC maker going “yeah. I don’t think we are going to put in a CD drive anymore because the DVD drive we have been including for years can do CDs as well”

There are still a lot of rather arbitrary decisions to make.

Is 4/pi inside or outside of the summation?

Is it (-1)^n+1 or (-1)^n with an additional negative sign in any of the other natural locations for it.

Is the e term outside of the fraction with a negative exponent, or part of the denominator.

Do you start with n=0 or n=1 (and adjust the terms inside the summation accordingly)

Did they expand (2n+1)^2?

Yes, I’ve 3d printed circles from freecad without issue. There are some precision options when converting to a mesh. I always set them to the tolerances of my 3d printer.

Overall, it still has a lot of rough edges though.

Agree on going with safty razors, but once you are there, you don’t want to cheep out. The one option my local grocery store carries is a $20 that is complete junk. I invested $70 in a Henson safty razor and never looked back. They also have a $250 offering for people who want the benefits of a safty razor without the cost savings.

For blades, I actually splurge and buy the $0.20/piece offering from Feather instead of the $0.10/piece ones that Henson sells. Still cheeper than the $0.80 safty blades the grocery store sells, or the checks app $4.50/piece cartridge blades the store sells?!?

Moral of the story: go cheap, but don’t be afraid of spending a little money to do so.