@veyselyigitk
Thank you for posting on HP Forums 🙂
Flower_Bud is at your service 🙂
As I understand, you wish to clean the PC,
No worries, as I'll be glad to help you,
Is this the first time you are attempting to open the tower and clean it inside, if yes, please be careful as I wouldn't want you to hurt yourself, that said, here's all you need to know about opening it 🙂
Cleaning the computer vents Air vents keep the computer cool. Keep these vents clean by using a small, battery-powered vacuum cleaner. (A battery-powered vacuum cleaner eliminates the risk of electric shock.)
1. Vacuum the vents on the computer case.
2. Remove any debris that has accumulated in and around the computer connectors (for example, the Ethernet and USB connectors)
To remove the side panel, follow steps from the link: https://hp.care/2rPG8Uk.
Hope this helps you 🙂
Have a great day 🙂
Cheers 🙂