Transferring photos(jpg) to usb - security restriction?

Hi all,

copied over photos to my work laptop from my iPhone 6/ipad air. I am now attempting to transfer over to a usb so can get the photos too. (Essentially want to Place on my own pc) - idiotically I did this on my laptop to save time but now think this was a wrong move given the security we have on it.

I have admin access (elevation tool) which has allowed me to change ownership to "everyone" etc. also attempted sharing to everyone. (So locally all pictures no longer have a little padlock on them)

however on transfer all pics come up as .xml and are essentially corrupt when viewing on a different pc. the moment I transfer the icon reappears on files on the usb and cannot be viewed the moment the files are on a different pc (note when the files are usb on the work laptop the little lock icon on the file, not the folders, reappear).

Clearly there is some security I have not disabled for me allowed to copy... Or something just really obvious that I have not done.

Is there anyway i can use itunes or other software compatible with win 7 to correct the issue?

Cheers in advance for the help.