 Method 0: Fix the missing HPWia0DrvRootWn0.dll error automatically Method 0: Update drivers to restore missing .dll files Method 0: Scan your PC for malware to fix hpwia0drvrootwn0.dll error Method 0: Fix HPWia0DrvRootWn0.dll missing error with System File Checker (SFC) Method 0: Fix corrupted HPWia0DrvRootWn0.dll file by performing System Restore 