Timmy has two upgraded Windows 10 laptops, and when he tries to move files around, the computers will slow down and ultimately crash. Leo says that Operating Systems have an index of all your files, and it could be that the indexes on both computers are corrupted. The indexes will need to be rebuilt. Click on the Windows key and type Indexing options. Select the rebuild option. It will take a while, so it's best to do it before you go to bed. Also, make sure the folders that Timmy is trying to move haven't been excluded. There's a button and listing for that.