I think my computer has been attacked.

Is there a trial version I can use?

Hello, 

Welcome. 

Yes it is here (direct link) https://www.kaspersky.com/downloads

Edited April 4, 20233 yr by nexon

why not try this tool first?

https://devbuilds.s.kaspersky-labs.com/devbuilds/KVRT/latest/full/KVRT.exe

some introductions

Kaspersky Virus Removal Tool is a free tool for running virus scans on infected computers under Windows and eliminating detected threats.

Kaspersky Virus Removal Tool is not intended for long-term use as it does not protect your computer in the real-time mode. After the computer is disinfected, remove the tool and install the full-scale antivirus solution.

Kaspersky Virus Removal Tool does not have a database update option. To get the tool with the latest databases, download the installer once again.

Kaspersky Virus Removal Tool features

The tool does not require installation or removal.

The tool is removed once its main window is closed. All files generated by the tool are removed from the system.

You can run the tool can be run from a removable media or a network drive.

 

https://support.kaspersky.com/kvrt2020/howto/15680

Showing here how to run the tool in advanced mode.

if your problem is related to potentially unwanted software like Adware or hack tool

try malwarebyte or emsisoft or eset.

 

emmm.....

in the end if K helped you, you can decide buy one for long-term realtime protection

Maybe he wants remove virus/viruses and try fully functional antivirus. 

3 minutes ago, nexon said:

Maybe he wants remove virus/viruses and try fully functional antivirus. 

yeap

so I recommend run the tool in advanced mode so that additional monitor drivers will be installed with start up of OS which

should achieve very similar functionality compare with kaspersky internet security.?

Thank you very much you two.

I am trying your advice now.