A computer has just started working very slow how will you troubleshoot probl?

First, you should download an antivirus program for your computer (I recommend iAntiVirus for mac or Avast for PC) if you don't already have one. Run a scan, and see if there are any problems. Next, you can clean your desktop and hard drive, getting rid of unused files and programs. You can also run a disk defragment. One last step, if you use Windows, would be to clean out registry errors. I suggest RegCleaner.