Having trouble saving AI files

[VROOOM]

IM working with Adobe Illustrator 10 and when I try to save work that I have done I get the message
"Can't save the Illustration. The file is locked. Use the properties command in windows explorer to unlock the file"

I don't have a clue what this means or how to do it, so can someone please help me

 

[blueark]

On PC: Right click the file, select 'Properties', deselect 'Read Only'.

On Mac: Ctrl-Click file, 'Get Info', turn off 'Locked'.

 

[askIllustrator]

if you cant lose your work copy everything and paste into a new document.

"Great spirits have always encountered violent opposition from mediocre minds." -Einstein