I'm not sure what's going on here. We haven't seen this before. It shouldn't actually get to the point where it's throwing an error if '8IKM4M55' doesn't exist in your 'storage' directory.
You can try creating a '8IKM4M55' directory manually, though that shouldn't be necessary. Also check your disk for errors.
And check again that you've completely disabled any security software, since that's the most likely culprit for weird issues like this.
Does it exist? How many files are inside it?
Also, have you tried restarting your computer?
and i have tried restarting my computer
You can try creating a '8IKM4M55' directory manually, though that shouldn't be necessary. Also check your disk for errors.
And check again that you've completely disabled any security software, since that's the most likely culprit for weird issues like this.
http://www.zotero.org/support/zotero_data
http://windows.microsoft.com/en-US/windows-vista/Check-your-hard-disk-for-errors