|Also... be aware that a factory restore will erase "all" your personal files in the process.. So if there's anything you'd like to preserve/save then do so first - i.e. before you do any factory restore routine.|
Copy those precious files to DVD at least; and if possible an external hard drive too is nice(r). Check the copies are accessible too on the system as is, and also on another working system (if possible). Then (having labeled them) put them somewhere safe...
Develop the habit/practice of regularly safeguarding/copying your files to external storage; just incase something goes awry with whichever computer you happen to be using at any time... That way your files are safe elsewhere.
As above - the actual model of your Vaio would be useful to know; as that pholks here can possibly advise more fully...?