Vlk
8
The RECYCLER folder is the Recycle Bin - you can try to discard its contents (it may be taking lots of space, indeed).
Another thing may be System Restore – try disabling System Restore for this volume (–> Control Panel/System/System Restore).
Anyway, I don’t think it’s going to be a virus (or any other malware)… 
Hope this helps,
Vlk