UI chage in different PCs

Hi Experts,

I have done some UI personalizations in Standard Iviews like made few buttons invisible and also changed the text (Label Text and made it a mandatory field).

In my system, with one particular user, the changes are applied. But with the same user if I log on in another system/ PC, the changes are not applied. it is showing it as mandatory field but change of text is still old text.

I am a bit confused as with the same user I am trying to log on in different systems/ PCs, in few it is working and in few it is not working.

if anyone has come across such issue, please let me know the solution.

Thanks!