Helping people with computers... one answer at a time.
Folders with random and unreadable names will occasionally appear on your machine. They're typically the side effect of an update that didn't clean up.
I found these two entries while using Windows Explorer in Local Disk C:
What do they mean? Can I safely delete them or transfer them to My Documents?
What they are is easy.
Whether or not you can, or should, delete them depends on where they are.
These folders are most often created by various update utilities - most often Windows update - as temporary locations to store files before or while the update is applies to your machine. They're supposed to be deleted automatically when the update is finished. But as you've experienced, that's not always the case.
Same for me, by the way. I just found a folder "C:\66b56c24fd10a4d55d658cce1cc19e" on my machine.
If you have more than one drive, you may find them on drives other than C: as well. I've found them on my external hard drive, E:, on occasion as well.
The short answer is that if these folders exist at the root of one of your drives, you're quite safe to delete them, particularly if they've been around for a while. They're just unnecessary leftovers from a previous software update.
If you're paranoid - and it's often good to be paranoid - you can always copy the folder to some other location or burn it to a CD. That way in case we were wrong, in case something appears to start misbehaving after removing the folder, you can always restore it from the backup.
Me? I just deleted "C:\66b56c24fd10a4d55d658cce1cc19e" from my machine.
One caveat: if you find these folders anywhere underneath your Windows directory, I'd be tempted to leave them alone. I've seen comments that it's possible that they might hold the updated files for a possible uninstall, or for Windows System File Protection. As long as they're not taking up much space, then they're fairly benign anyway.
However if you can't resist and want to delete them anyway, then I definitely recommend copying them somewhere for safety first, just in case.
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