For the last couple months I’ve been troubleshooting a vexing problem on my new quad-core HP desktop: Roughly once per week, the machine would start running as slow as molasses. And I mean slow: ...

2) Defragment your hard drive: As you use your computer - install, uninstall, add and delete - the hard drive can get the digital equivalent of a messy garage. Cleaning up your hard drive is easy to ...