I picked this solution from another SF thread
Quote: Originally Posted by lincolnportbury
I have had this same problem with my XPS 8300 for the past two weeks since turning my machine on and have been able to temporary fix with solutions suggested in this forum however it would always return UNTIL I removed Dell DataSafe remote backup. Halfway through the uninstall all the maximised windows snapped back to the top and have stayed that way. I have no need for DataSafe so no loss for me. Hope this helps anyone else. thanks, lincoln
If backup is important to you, you can use the windows 'Backup and Restore' feature. Simply type 'backup' in the start menu search field.
Hope this helps.