Know You,Know Me!

Hey im having a weird issue where every couple of hours a notification will pop up saying my windows defender or webroot(my actual antivirus) are shut off and that their spyware protection is shut off. But, ive been checking both of them as soon as that pop up shows up and they both seem to be working properly. Also their have been a couple random screenshots popping up and saving to my onedrive. Is this the sign of any virus? ive been running scans but everything is showing up clean. Some other info that might prove useful: i did take a screenshot earlier today, and this was my first time ever taking one. Im using an external mechanical keyboard and never had any issues with it. Also i lent a class mate my computer for a quick moment a couple days ago, before that i never had any issues.

Below is the code from that only works on one sheet ("1")... I would like it to to work on the entire workbook. Sub Worksheet_Change(ByVal Target As Range) If Target.Address = "$C$5" Then If IsDate(Target) Then Sheets("1").Cells(23, 1).Insert Sheets("1").Cells(24, 1) = _ "Pre-Construction Meeting: " & Target.Value Sheets("1").Cells(25, 1).Insert End If End If If Target.Address = "$C$6" Then If IsDate(Target) Then Sheets("1").Cells(23, 1).Insert Sheets("1").Cells(24, 1) = _ "Anticipated Start Date: " & Target.Value Sheets("1").Cells(25, 1).Insert End If End If End Sub