Windows7 and Ready Boost

Yes, I know. Sorry about that. I am dealing with a customer issue right now, and I am not completely focused on your issue.

I am confident, however, that we have uncovered the cause of the problem, now how to fix it. The best option, solely in terms of allowing a self-correction, is to perform a clean install. During that install, if possible, delete all partitions, then create a new partition using the entire drive. Windows will automatically reserve the volume area BitLocker requires.

Is this feasible for you?

Have you tried the disble BitDefender ZigZag suggested?

I cannot disable BitDefender, because I don’t have TPM.
Yes, have DVD’s for a clean reinstallation of Vista and Windows7. But I prefer to wait,
until the new binary for the Bitlocker Drive Prep tool comes out, having ReadyBoost is not an urgent matter for me.
Thank you very much for your expert advice

Sorry I meant BitLocker. I do not have BitDefender installed