Posted 08 July 2008 - 08:31 PM
Why don't we start with some basics, like what make and model computer do you have?
How much RAM do you have?
How large is you hard drive, and how much free space do you have?
Reinstalling the operating system will usually get you back to the speed that you had when the computer was new.
As nigglesnush85 posted, reformatting will erase all of your files. If you are thinking of reinstalling the operating system then you should back up all of your important files and programs that you don't have the installation discs to reinstall them with. I would suggest backing up these to a removable media, like CDs, DVDs, a flash drive, or a storage hard drive.
Family and loved ones will always be a priority in my daily life. You never know when one will leave you.