How can I check for and remove any malicious software that might be slowing down my PC?

1. Install and run a trusted antivirus program. Make sure to update it frequently.

2. Scan your computer for any viruses, spyware, or other malicious software. Follow the instructions provided by the antivirus program to remove any malicious software that is detected.

3. Check for programs that are running in the background. Uninstall any programs that you don’t recognize or don’t use.

4. Use a reliable registry cleaner to scan and clean up your registry.

5. Reboot your computer after the scan and clean-up process to make sure all malicious software has been deleted.