Best answer as chosen by user Dummy888: My best advice is.
1. Save your files.
2. Try other restore points. Getting it booted to use a restore point is far beyond what I can write here. The link and content I offered about XP install from Sony is used along with diskettes, the XP CD and often some USB DVDRW and Floppy Drive to perform the recovery. This is now consider far too much to ask of users today.
3. See step 1 then move it up to Windows 7.