There are various things you can do increase the speed of your HP Computer. Some of them are as follows.

1. Delete programs that you never use.
2. Limit the number of program that will run at start up.
3. Defrag your Hard Drive.
4. Clean your Hard Drive (Remove Unwanted Stuff).
5. Run Few programs at the same time.
6. Turn Off Visual Effects.
7. Regularly Restart your Computer.
8. Install more RAM.
9. Look for infected files and viruses and remove them.
10. Delete Temporary files.

These steps will help you to increase the performance of your HP Computer. You can also contact HP Printer Customer Service Number for help with issue.  

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HP Printer Technical Support