@ kitz
What do you think of what I was about to post
Some thoughts!
Do you actually want to recover any of the deleted files? If "yes" Recuva may be a good bet.
You could try and use a previous version of the Recycle Bin, if one is available.
To find the recycle bin location:
click on Windows>Computer>(OS)C: then when the page appears
click Organise> Folder Options >View then in the drop down
select Show hidden files & folders: deselect Hide Protected Operation System Files.Click Apply.
You will se an item $Recyclebin. Right click. Select Restore Previous versions. Hopefully you will find on that predates your troubles.
( I assume you are a sole user with adminstator rights. If you meet with a warning that you need permission just click on continue).
If that does not work you could try deleting the bin, restarting computer, when you may well find a replacement, again hopefully behaving properly. I have deleted the bin and a one has always shown up.
Now wait for the experts to chastise me!