I’m Eakgaluck from TTC, this mail to use for reference with you about the result after checking your laptop.
Your problem was problem from Win7 not operation. In case, you should to back up your data via transfer data to the external HDD if you have.
This symptom have to fix by format HDD and install OS win7 but TTC don’t have OS win7 JP version to support you. Thus, if need us to help for installing please provide me for OS win7 JP version as DVD disc.
However, if you have someone to help for back up data and installing OS win7 please kindly let me know.
I will prepare the laptop to waiting you at the counter service.
Ps. If you need to buy the external HDD for back up data please let us at counter service, we will offer you for the special price as details below.