files keep reappearing when deleted from USB stick

Help - My usb memory stick was used in a computer with some sort of virus.
When I opened the stick on my mac there were some files I did not recognise so I trashed them, and then securely emptied trash. HOWEVER... even though the trash seems empty if the usb stick is not attached, as soon as I plug it in the files reappear in the trash and I can't get rid of them. As soon a i remove the stick they go.
Is the only remedy to get rid of the stick?

NOTE: Thread moved to appropriate forum. Not just anything goes in Anything Goes

Put the memory stick back in a PC and reformat it then put it in the Mac and reformat it again depending on whether it will be used in Macs or Macs and PCs.

before using any USB drive first scan with your antivirus. If any virus is affected to your USB he remove it.

I did, it didn't.
Thanks for the help.

And as for the reappearing files , empty the trash while the drive us mounted.

clayneal said:

And as for the reappearing files , empty the trash while the drive us mounted.

Click to expand...

I did,
it didn't.

-Press and hold the mouse button on the Trash icon in the Dock. The context menu for Trash will display.
-Press and hold the Option key.
-Select Empty Trash from the context menu for Trash.
Release the Option key.

or...

1. Launch Terminal, located in the Macintosh HD > Applications > Utilities folder or search Spotlight for Terminal

2. At the Terminal prompt, type the following command exactly as written:

sudo rm -rf ~/.Trash/*

What (exactly, as in the file names and extensions) are the 'reappearing' files?

Just because you don't recognize them, doesn't mean that they are malicious.

They seem to be locked files, with a date and time stamp which match the time my stick was in the said contaminated computer. I don't want to try and unlock them for obvious reasons.

Do you have files on the stick that you wish to retain? If so, transfer them to another flash drive or to a CD. Then reformat the original stick as Collin Bl has suggested. Locked files can't be deleted, but reformatting will nuke them.

oldcelt said:

They seem to be locked files, with a date and time stamp which match the time my stick was in the said contaminated computer. I don't want to try and unlock them for obvious reasons.

Click to expand...

Again, I'll ask:

D3v1L80Y said:

What (exactly, as in the file names and extensions) are the 'reappearing' files?

Click to expand...

Many times, there are things like .DS_Store files that occur. These are harmless, but people get worried about them if they're not familiar with them.

You still haven't told us what version of OS X you're running, so that can play a part in what file types occur as well.