I've been having the exact same problems. Whenever I try to access my usb flash drives, ipod, etc., my computer gives me a message which reads...
Code:
X:\ is not accessible.
Access is denied
As I've read Alcohol 120% seems to the same thing as Daemon Tools does. I installed Alcohol a while ago, but since then I've upgraded to Windows XP SP2. I believe that is when the problem first started.
So far I've tried both the SPTD and the registry editor solutions and the only positive result achieved so far was windows asking me to open my flash drive... but only once. I unplugged the flash drive, then plugged it back in, but it seemed to relapse back into its stubborn inaccessible mode. I've also tried repeating the removing of the SPTD and I haven't connected since. Perhaps I should've left it plugged in and restarted the computer or something before I disconnect it? Also, since the solution doesn't seem to be working after the first try, is there any way I can reset the settings and start from the beginning?
Thanks for the solution posted anyway. Any more help would be much obliged.