Hi Alihyde75,
Welcome to Sony Community!
Sorry to hear that you can't access the hidden partition anymore. If F10 won't give you the options to do a system restore then a VAIO recovery disc is needed.
We highly recommend visiting our Sony Global Web site for information on contacting the Sony Support Center in your region at http://www.sony.net/SonyInfo/Support/ to assist you with this issue.
Regards,
Jen
Answered your question? Glad I could help! Please Click the "Accept as Solution" button below.