I had a virus like this awhile ago, bit of a pain really but it didn't seem to cause any damage.
First off can you see the hidden files? If not, then go to Folder & Search Options -> Under the view tab go to show hidden files and folders.
If you want to change everything from hidden to non-hidden, select the most root folder and then right click on it and select properties. Under there, uncheck the hidden box and it should change all the files back to normal.