Hi
my understanding is as follows; File in the recycle bin will be as follows:
Windows
OriginalFileName.inf {once deleted by windows} riginalFileName.inf with first character missing with an option to restore the file. This is helpful on occasions if wrong file is deleted as the file can be reconstructed and restored, *once deleted from the recycle bin the file will be stored on the hdd platter and as long as the hdd cluster/sector has not been overwritten a recovery program could be used to fully restore the file.
AVG
Avg *should shred the file beyond recognition and write over the hdd cluster/sector where the file was stored. It would make it a lot harder to recover the data without access to some sophisticated hardware recovery tools.
Edit: To add some meat to the bone here is a quote from AVG
"AVG File Shredder provides you with an easy way to permanently and securely delete a file, folder or the Recycle Bin contents on your computer. Files deleted using AVG File Shredder cannot be recovered even with the use of advanced disk utilities.
Please note that the option to shred files is not available on locked files, USB drives, flash disks, memory cards, network drives, RAID-enabled systems and SCSI disks. The same is valid for special types of files such as symbolic links, junctions and mount points."
Source -
http://www.avg.com/us-en/faq.num-5495
Other members of the TPU community may have more information
atb (all the best)
Law-II