Hi
You should have made the recovery disk set when the PC was new or at least before resetting it.
The Toshiba l450 D I had was windows 7 based
Toshiba is the only one who can supply a genuine recovery disk
There are a few companies selling replacement recovery disks .
I have no idea if they are genuine or full of malware
Some one with an identical model could give you a recovery disk set
The windows on the recovery disk detects the motherboard model so can only be used on a Toshiba lL455D or possibly a l450 D motherboard
Regards
Mike Barnes