How to Fix Windows Missing Driver

A long-standing but fortunately rare defect in Windows can cause it to lose a driver.  The following procedure fixes this problem when it occurs with the Tactical Software Serial/IP redirector.

  1. Disable any anti-virus/malware programs on the PC.
  2. In the Windows Control Panel | Add/Remove Programs applet, try uninstalling Serial/IP, if it is listed.
  3. In the Windows Device Manager, choose View | Show Hidden devices. On the right-hand pane, open the Non-Plug and Play Drivers section. On the "Serial/IP Serial Driver" and "siserial" drivers right-click and choose uninstall, if present.
  4. Delete the C:\Program Files\Tactical Software\ folder, if it is present.
  5. Rename the <windows folder>\system32\drivers\siserial.sys file to siserial.old, if it is present.
  6. Run the Microsoft Installer Fixer program located here: http://support.microsoft.com/mats/Program_Install_and_Uninstall
  7. Do not skip this step.  This issue is most likely caused by some corruption in the Windows registry and running this program is the only way to fix it.
  8. Reboot the PC.
  9. Reinstall Serial/IP version 4.10 (do not use an older version) from a Windows command prompt with the following parameters: SerialIP410.exe /l*v c:\install_log.txt

If the install fails again, email support@tacticalsoftware.com attaching both the c:\install_log.txt and c:\windows\dpinst.log files, if present.