Can not move to library.
 

Will some one tell me:

1) Why this occurred
2) Where did the file go
3) Can I get the file back

I have a 200 gb hard drive. 512 memory, 2.7 processor,

Go to your LW's menu Tools>Options>Saving & reselect your downld location & press apply. I should imagine your file is still in the incomplete folder. Doing this should at least fix things up for future downlds. It sounds like the file was complete so you could simply move it out of the incomplete folder to wherever you desire.