Those WIM/SWM files were put on your hard disk, in the recovery partition.
In some way, you, or a program you used, deleted completely the recovery partition.
Without the recovery partition, you can't do a factory reset (i.e., you can't put the things/folder/files like they were when you bought the laptop).
Hence in this thread we have solved your other thread: the solution is to buy the recovery cd/dvd from the manufacturer (ACER), if they still have it...
(I.e., what Digerati said in his first reply!)
Now, for the USB drives not recognized, we could still try to find the cause...