Software & Apps Windows How to Fix Ftd2xx.dll Not Found or Missing Errors A troubleshooting guide for ftd2xx.dll errors By Tim Fisher General Manager, VP, Lifewire.com Tim Fisher has 30+ years' professional technology support experience. He writes troubleshooting content and is the General Manager of Lifewire. our editorial process Facebook Twitter LinkedIn Tim Fisher Updated February 28, 2020 Windows The Ultimate Laptop Buying Guide Tweet Share Email Ftd2xx.dll errors arise from the removal or corruption of the ftd2xx DLL file, which is a file that's part of a device driver from Future Technology Devices International. Ftd2xx.dll errors are usually associated with a USB driver issue. In some cases, ftd2xx.dll errors could indicate a registry problem, a virus or malware infection, or even a hardware failure. There are several different ways that ftd2xx.dll errors can show up on your computer. Here are some of the more common ways that you might see ftd2xx.dll errors: Ftd2xx.dll Not FoundThis application failed to start because ftd2xx.dll was not found. Re-installing the application may fix this problem.Cannot find [PATH]\ftd2xx.dllFailed to load ftd2xx.dllThe file ftd2xx.dll is missing.Cannot start [APPLICATION]. A required component is missing: ftd2xx.dll. Please install [APPLICATION] again. Ftd2xx.dll error messages might appear while using or installing certain programs, when Windows starts or shuts down, or maybe even during a Windows installation. The context of the ftd2xx.dll error is an important piece of information that will be helpful while solving the problem. The ftd2xx.dll error message could apply to any of Microsoft's operating systems including Windows 10, Windows 8, Windows 7, Windows Vista, Windows XP, and Windows 2000. How to Fix Ftd2xx.dll Errors Do not download ftd2xx.dll from a "DLL download" website. Downloading a DLL file is a bad idea. If you need a copy of ftd2xx.dll, it's best to obtain it from its original, legitimate source. Start Windows in Safe Mode to complete any of the following steps if you're unable to access Windows normally because of the ftd2xx.dll error. Restore ftd2xx.dll from the Recycle Bin. The easiest possible cause of a "missing" ftd2xx.dll file is that you've mistakenly deleted it. If you suspect that you've accidentally deleted ftd2xx.dll but you've already emptied the Recycle Bin, you may be able to recover ftd2xx.dll with a free file recovery program. Recovering a deleted copy of ftd2xx.dll with a file recovery program is a smart idea only if you're confident you've deleted the file yourself and that it was working properly before you did that. Run a virus/malware scan of your entire system. Some ftd2xx.dll errors could be related to a virus or other malware infection on your computer that has damaged the DLL file. It's even possible that the ftd2xx.dll error you're seeing is related to a hostile program that's masquerading as the file. Reinstall the program that uses the ftd2xx.dll file. If the ftd2xx.dll DLL error occurs when you use a particular program, reinstalling the program should replace the file. Try your best to complete this step. Reinstalling the program that provides the ftd2xx.dll file, if possible, is a likely solution to this DLL error. Update the USB device drivers because that's what the ftd2xx.dll file is used for. If updating drivers through that link doesn't work, try downloading them directly from the source or contacting the developer directly through the FTDI website. Roll back a driver to a previously installed version if ftd2xx.dll errors began after updating a particular hardware device's driver. Use System Restore to undo recent system changes. If you suspect that the ftd2xx.dll error was caused by a change made to an important file or configuration, a System Restore could solve the problem. Install any available Windows updates. Many service packs and other patches replace or update some of the hundreds of Microsoft distributed DLL files on your computer. The ftd2xx.dll file could be included in one of those updates. Test your memory and then test your hard drive. We've left the majority of hardware troubleshooting to the last step, but your computer's memory and hard drive are easy to test and are the most likely components that might cause ftd2xx.dll errors as they fail. If the hardware fails any of your tests, replace the memory or replace the hard drive as soon as possible. Repair your installation of Windows. If the individual ftd2xx.dll file troubleshooting advice above is unsuccessful, performing a startup repair or repair installation should restore all Windows DLL files to their working versions. Use a free registry cleaner to repair ftd2xx.dll related issues in the registry. A free registry cleaner program may be able to help by removing invalid ftd2xx.dll registry entries that might be causing the DLL error. I rarely recommend the use of registry cleaners. I've included the option here as a "last resort" attempt before the destructive step coming up next. Perform a clean installation of Windows. A clean install of Windows will erase everything from the hard drive and install a fresh copy of Windows. If none of the steps above correct the ftd2xx.dll error, this should be your next course of action. All the information on your hard drive will be erased during a clean install. Make sure you've made the best attempt possible to fix the ftd2xx.dll error using a troubleshooting step prior to this one. Troubleshoot for a hardware problem if any ftd2xx.dll errors persist. After a clean install of Windows, your DLL problem can only be hardware related. Need More Help? If you're not interested in fixing this problem yourself, see How Do I Get My Computer Fixed? for a full list of your support options, plus help with everything along the way like figuring out repair costs, getting your files off, choosing a repair service, and a whole lot more.