Originally posted by reyesmac
As long as you save all your important files and preferences first. If you have already done that you should have no problems with reformatting your disk and installing it from scratch. If you want to update your existing copy of Jaguar, make sure you disable andy hacks or applications that modify the system. You might not really need to do all this, but in the event of problems, you will be glad you did. I updated a fresh copy of jaguar and it is running faster than it ever has on this old B&W.
By the way, if you use your Mac primarily as a business computer, you should wait a few days just to be sure there isn't some bug everyone will be reporting over the weekend.
When you clean install it, it also takes a fraction of the time to install... and I do mean fraction. You are better served to just copy off your important files, clean install, and bring those files back to the machine.