Send the following on WhatsApp
Continue to ChatInstall Windows 7 Ultimate 64-bit on Compaq Presario CQ42 https://www.techonia.com/61/windows-7-64-bit-compaq-cq42
Install Windows 7 Ultimate 64-bit on Compaq Presario CQ42 https://www.techonia.com/61/windows-7-64-bit-compaq-cq42