This is Harish from Dell social media outreach team,
These are my suggestions
1.Restart the computer.
2. log-onto safe mode with networking,
3. To get into the Windows 2000 and XP Safe mode, as the computer is booting press and hold your "F8 Key" which should bring up the "Windows Advanced Options Menu" as shown below. Use your arrow keys to move to "Safe Mode" and press your Enter key.
4.Install Malwarebytes run the programme check if there is any infection.