Why does a computer suddenly slow down?

Lack of resources: CPU [cycles], RAM, Disk Space.

If a new program is installed [intentionally, or no] Or, if a new process is started [intentionally, or no] they will use up resources. And when one or more of the resources become critically low, the performance of your PC degrades quickly.

When you experience sudden computer slow downs, it's highly likely that your computer got infected. First of all scan your computer with up-to-date antivirus and antispyware software. If nothing is found and you are sure that there are no infections, try the following:

# Remove all the big files from your desktop

# If your hard disk is full get some external usb hard disk and use it to store large files, like movies, music and pictures

# Remove temporary files and other junk files # Defragment your hard drive # Scan your PC for registry errors

Slow makes ofcourse big ressources programs and startup programs... use TuneUp utilities and Auslogics Disk Defrag.

Another answer

Many people encounter the following computer problems: take a long time to start up, load websites or run programs. Recently I find functional software can fix all these problems.