Protect sheet issue

Hello,

My user form has a line of code that protects the sheets and does not allow any changes and selection of cells. It worked great on my personla computer.

Running the file on another computer the code does not protect the sheet. The strange thing is that if I go the Tools>Protection> the options is set to Unprotect. That measn that the code actually has protected the sheet but I am still able to make chages. If I manually unprotect and again protect the sheet, it is protected till the time close the file and open it again.

Any suggestions for the reason of this strange behavior?

To best describe or illustrate your problem you would be better off attaching a dummy workbook, the workbook should contain the same structure and some dummy data of the same type as the type you have in your real workbook - so, if a cell contains numbers & letters in this format abc-123 then that should be reflected in the dummy workbook.

If needed supply a before and after sheet in the workbook so the person helping you can see what you are trying to achieve.

Doing this will ensure you get the result you need!

Do all the computers have the same exact version of Excel on them?

With the same updates and service packs applied? Check the exact version under Help - About Microsoft Office Excel on each machine.

Update Office on your machine?

If the same code works on multiple machines that have been updated and fails on machines that haven't, it stands to reason that something in one of the updates fixed a bug, rather than there being anything wrong with the code. (of course, we haven't actually seen the code, so I'm just going on logic here)
The fact that your machines are not all on the same level in a corporate environment is frankly slightly worrying too!