Unhiding folder or files in Windows is very easy, you can do this using explorer menu bar and go to Tools > Folder Options > View Tab then choose the Show hidden files, folders, or drives. By doing this steps, you will see some hidden files on your system but not all. Yes, you read it right. Some files may not be unhide by the operating system because it can be harmful. If you are sure that your files are 100% safe, then you may try the guide below to unhide your files using command prompt.
STEP 1
Windows XP
Click on Start > Run > Type cmd and click ok
Windows Vista/7
Click on Start > Search programs and files > Type cmd and press enter
STEP 2
Check the letter of the disk you want to unhide and type attrib -h -r -s /s /d [drive letter]:\*.* and press enter.
Note: Change [drive letter] by the letter of your choice.
Thats it! Check if all your folder or files are already visible.