MS_Excel Debbuging doesn´t work

[Luis_Macros]

Some partners and mysefl since months ago, have this issue, when we try tu run any macro with F8 (step by step) it runs totally as press Key F5.
Someone could help to solve this, it is on all Excel's Computers with all macros, here.

 

[jkpieterse]

Is there any software that might affect the keyboard? Does it do this on any Excel file, or just on (a) particular one(s)?