緊急求助:file locked

緊急請求幫忙:最近重新格式化系統硬碟C並重裝XP及相應軟體,結果發現備份硬碟D里的一部分GIF,JPG文件無法打開(其他絕大部分的JPG文件仍能打開,但所有GIF都打不開了).在試圖打開這些文件時,得到的信息是:because the file is locked. Use the "roperties" command in the Windows Explorer to unlock the file". 從來不曾遇到這種情況.哪位朋友知道這是怎麼一回事嗎?怎樣才能重新打開這些文件呢?
萬分感謝!

right click on the file -> Unlock. This is because you have downloaded these pictures from another MSN Messenger friend, this is newly added security for MSN for preventing virus spread.

[QUOTE=剛果共和國]right click on the file -> Unlock. This is because you have downloaded these pictures from another MSN Messenger friend, this is newly added security for MSN for preventing virus spread.[/QUOTE]
Thanks to 斑竹! But there's no "Unlock" command showed while rught clicking on the file. And, actually all these image files(those MS Office files are not affected) are downloaded directly from BackChina not another Messenger friend, and most of them are still OK. Do you have other idea about this issue?

autumn tree

right click on the file -> Unlock

Sorry, I mispoke. Try Right click and go to properties and then there will be an unlock button on the bottom. Let me know if this worked.

[QUOTE=剛果共和國]Sorry, I mispoke. Try Right click and go to properties and then there will be an unlock button on the bottom. Let me know if this worked.[/QUOTE]
There's no Unlock button in Properties tab while right clicking over the file. I can not find any place related to file locking/ unlocking issue.