Hi Kimio,

Can you please provide more information regarding your concern? If you are using the free version, you will have limited functionality only.

PC Reviver is a tool which helps you to identify problems found in your PC and repair them. It is a multi-purpose utility that will diagnose errors on your PC, safely repair them, and provide other maintenance and optimization recommendations.
You can try the free, trial version of PC Reviver and use it but for limited functionality only. PC Reviver is offered as a feature limited trial. Some of the functions of PC Reviver can be uses 100% for free in the trial while other features are unlocked when you purchase a license to use PC Reviver.

You can only use the features are which are present in the free trial, for using more features you need to unlock them by buying the product. You will need to purchase a license code for PC Reviver to be able to fix all the issues.

If you want to improve your PC performance without spending any bucks, you can use the below methods as well.

Method 1: Keep updating Windows

To access Windows Updates, just hit Start, type “Windows Update,” and then hit Enter.

Windows Update divides updates into “important” and “optional”. Important updates are selected for download and installation by default. Optional updates are not selected. To control what updates are installed, just click the pertinent link.

The window that opens allows you to select each update you want to install.
If you have updates on the list that you know you won’t ever install and would like to stop seeing them, just right-click one or more updates and then choose “Hide updates” from the context menu.

When you return the main Windows Update window and click the “Install updates” button, all the important and optional updates you’ve selected are downloaded and installed.

I hope this helps.

Regards,
Lokesh