When the F10 option fails we need those restore disks. Why? Because the hard disk contents can be corrupted and the CD/DVDs are not exposed to whatever corrupted the system.
Your cheapest fix is to order the restore media from Sony.
I am trying to complete a system restore on a Sony Desktop (VGC-RB40). There was no boot disk provided with the PC and system restore from hard drive (pressing F10) was suggested. System restore started and while going through the process a blue screen came up with an error message that mentions something about not running ISSAS.exe due to a missing .dll file. I have retried the restore process but the blue screen with the error persists and I am not able to complete the process.
I would appreciate it if someone here could help me with this issue. Thank you very much.