|You can be pretty sure that folders with those names are not important.|
If Safe Mode doesn't work you could use a Linux Live CD (such as Puppy Linux). You should be able to delete them using LInux because Windows will not be running. You set your CD to be first (from BIOS) then boot with the Live CD in the drive. When you close down and remove the CD, Windows will work as usual - minus the folders.
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