Data corruption in QuickBooks can result from several factors such as improper shutdowns, software conflicts, network issues, or hardware failures. Other causes include virus attacks and corrupt backup files. Make regular backups of your QuickBooks data and store them in a safe place to protect against corruption. Make it a habit to properly close QuickBooks to prevent improper shutdowns, and make sure your system is free from malware. Use good hardware and a stable network while working in multi-user mode to reduce the risk of issues. In case of corruption, the SoftMagnat QuickBooks File Recovery Tool can help restore your files by repairing errors like 6000, 80, and H202 efficiently, thus protecting your important business data.