Locking a file

Afternoon all,

We have PDM and no it is not installed and probably never will be.  I have for the last time rebuilt, reassembled, and re-repaired my models after other people get into them.  I do not mind people viewing or using them to work their electronic pcbs around, but I do not want them to be able to mess with my file in any way at all.  If they come in to the office before I do or open the files before I do, the damage can already be done before I try to open my files only to see I can only open a copy of the file or files.  They could have saved over the top of my work many times before I see whats going on.  By then all I get to see is RED in the model tree and failed features, mates, and everything else.

I please need help in locking my files.  Assemblies, parts, and drawings alike.

Thanks

Sid

SolidworksAssemblies