Recently on a forum, a person said they were given an old PC running Windows and it was getting very slow. If you are in that position, read on.
If you have an old Windows XP PC, there is probably a lot of defragmentation on the hard drive, and lots of files from software that was installed and then uninstalled as well.
You should defragment the hard drive. Also scan for viruses and spyware, and rootkits. If it is still slow, then it might be best to back up all your...