In an attempt to backup my entire PC I beleive I mistakenly tried to copy everything to the D drive. Now my D drive has only 15% available free space on it. The recovery partition is in intact. How do I undo this error without messing upm the recovery Partition. I just had windows Vista Ultimate installed and was trying to back up my PC with this new OS, along with files and settings. There is a red bar showing how much disk space usage and and available free space. How do I undo this?