There are two hidden folders beside the Windows.old folder. You have to set the folders view to show hidden or system folders. They should be listed at the top of the C: drive with a ~Q or something like that. You might check those.
If your files were from iTunes, it might be a problem since iTunes was listed as a problem in the compatibility checker, but hopefully they are there as mine were.
Operating System Win 7 x64
Computer Type Homebuilt
OS Service Pack 2
DirectX Version 11
CPU Type and Speed i7 3770K
Motherboard Chipset Asus P8Z77-V Pro
System Memory Type 16 GB Kingston
Video Card Type and Speed Nvidia GTX 680 (2)
Computer Monitor LG 27" (3)
Hard Drive Kingston 240 SSD
Optical Drives LG WH12LS30 Blu-
Modem-Router Type Linksys E3000
Network Adapter Intel Gigabit
Anti-virus Software MSE
Computer Skill Level Average Ability
Windows Experience Index 7.7