|Definitely run the utilities Derek has listed - first.|
JRT usually installs itself to the desktop, from you run it. It will open a small dos style window, Follow the instructions therein. I will reboot the system as part of its process.
Install all the utilities using the manual/custom mode - not the default automatic. Watch for any pre checked boxes and uncheck them all, other than one for the actual utilty itself. This way you avoid installing all manner of junk and changes you neither need nor want.
Before you go anywhere near a factory restore, ensure that "all" your personal files are safely duplicated/copied to external storage. Typically dvd, but an external hard drive is nice(r) too... This ensures you won't lose all those important files, photos etc... A factory restore/reset erases all your personal files in its process...; so safeguard them first - ideally now.
And develop the practice of regularly duplicating personal files as above, regardless.