Trojan virus on computer. Can't open any programs.

Hi,
The other day my kapersky antivirus detected a trojan on my Toshiba laptop. I deleted it. I also downloaded and ran malwarebytes. The computer has slowed down dramatically. I can't even open any program's now because the cursor shows as loading.
Can you help me. My knowledge of computers is very low so please explain things for me in layman terms.
Thank you so much

Can you check the laptop's full model and part numbers from the label on the bottom? Don't include the serial number.
Do your antivirus and antimalware programs show your computer as clean now?
- Peter

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Trojan virus on computer. Can't open any programs.

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