Do you ever see your folders or even drive name in blue instead of black? No need to panic, because I also came across this the other day there is a logical explanation about it.
Blue means that your files are encrypted (not very likely) or compressed files. It’s a feature of the NTFS file system used by XP. But I have found that people using other type of Windows are also experiencing the same thing. Even the new Windows 7. Blue files can also appear if you run disk cleanup and choose to “compress old files”.