I have two flash drives that refuse to be recognized by windows 8.1

[BirdDad]

Actually they are microSD card hat refuse to be recognize by any adapter or port they are plugged int. TrueCrypt recognizes them when I plug them in, it allocates a potential drive letter.
they are USB3.0 and other microSD cards work.

 

[Fardringle]

Do these flash drives/SD cards work on other computers?

 

[BirdDad]

yes

 

[Ketchup]

Did they ever work on this PC? If this is a recent change, look at recent driver/software changes.

 

[BirdDad]

Yes they both worked.
M$ updates are the only thing I installed a few days ago.

 

[Burpo]

Do a system restore to before the last updates