Bitlocker denying write access to usb thumb drive

RESOLVED!!!!!!

I went to my system restore points and only saw one there from 3/30. That was strange, as it should have been capturing them frequently.

Anyway, I figured since two of my usb drives showed up as write protected on the windows 7 system and they show up fine on windows XP and windows 2008, I figured it had to be something that changed recently as you suggested. After pouring over the group policy editor (gpedit.msc) and not finding anything enabled, I figured something in the registry must have changed.

So I hunted in the current control set and found a setting RDVDenyWriteAccess enabled.

After hunting on the internet, I found this.
http://www.group-policy.com/ref/poli...d_by_BitLocker

These two settings are mentioned on that site.
HKLM\System\CurrentControlSet\Policies\Microsoft\FVE!RDVDenyWriteAccess
HKLM\Software\Policies\Microsoft\FVE!RDVDenyCrossOrg

The RDVDenyWriteAccess was set to 1, but the RDVDenyCrossOrg was set to 0. After disabling RDVDenyWriteAccess, I pulled out my usb drive and re-inserted it. And I could write to it again!!!

I am so relieved. Thanks all for your help and suggestions! It is appreciated!

Glad that you got that solved. I had a hunch that System Restore would be your last possible option. Always, from now on, make sure that your flash drive (or any external drive) is not plugged in while updating.

Another thing, while we're here. Do you backup your computer? If not, now's the time to begin to do so. Because sometimes, System Restore doesn't give us the desired results. Some updates wipes all of the restore points out (like SP1 did). I've had it to work for me & had it not to work for me.

A backup image, taken when everything's in good working order, is the safest bet that you'll have.

Best of Luck,
Cat