Security permissions

I couldn't figure out if this post fit better in this area or the area that seemed to deal more with firewalls and AV software, my luck, neither, so I will trust to the discretion of the moderators...

I synched some directories between two computers. Now I have a directory on this computer and all the files in that directory say I don't have permission to view them. When I open up their "properties:Security:Group or User Name" I have to add my identity to each one individually, and there are many...

Is there an automated way to bail me out of this mess? (Probably like I must have gotten myself into it?)

Thank-you VERY much!

I would like to add a specific username with Full Control permissions to every single file in certain directories where I caused the problem. Not exactly certain how I caused it - either copying some files that were specifically configured for my user account on a different computer or by the mis-use of the Take Ownership script, but somehow I have found that a number of document-type files (.pdf, .docx, .xls, .xlsm, ..., and some other related files) refuse to open. When I add my username on this computer to their security permissions all is fine. Presently I am fixing them one at a time, but if there is a batch method I sure would be happier-

Thank-you!