Microsoft developers’ ignorance has hit jackpot one more time. If you “protect” a sheet or workbook, Excel only places a special tag inside .xlsx file. Changing it and thus “unprotecting” such file is a piece of cake.
You can remove it in a matter of two minutes using software like Total Commander or 7-Zip. By doing so, you can gain access to “protected” sheet or workbook without knowing a password. Something that in theory should never happen.
In previous versions of Excel (Office) that were using old .xls file you had to work with some nasty, multi-level macro to unprotect a protected file. Now they have made even easier. Instead of using some dully macros all you need is a text editor and a file to unpack and repack archive.Read More ““Unprotect” a sheet or a workbook in Excel”