How to Fix ~F066.tmp Error? Is it safe?

Frustrated by the ~F066.tmp error message? Well, you should want to know what this ~F066.tmp file is, what causes this error and the most important thing is how to fix this error. In this page, you will find all answers to your questions about this ~F066.tmp and the methods to fix it.

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What's ~F066.tmp File?

As its file extension denotes, ~F066.tmp is a vital TMP file and it's created by the software Steam Support developed by Windows Software Developer. The latest version of ~F066.tmp file is 1, 1, 0, 1525 and MD5 value is f3ce1d8a91de6dc2085350896b9ee5cb. Steam Support and the Windows will generate ~F066.tmp error when ~F066.tmp file cannot be used due to the removal or corruption of ~F066.tmp file. This error can be seen on Windows XP, Windows Vista, Windows 7, Windows 8 and Windows 10.

~F066.tmp file information:
File Name:   
   ~F066.tmp (Free Scan)
File Description:   
   Steamworks CEG - GetVolumeInfo Bugfix May 2009
Product Name:   
   Steam Support
Product Version:   
   1, 1, 0, 1525
   Windows Software Developer
File md5:   
File type:   
   tmp file
Security Level(0-5):   
OS Infected:   
   Download ~F066.tmp Error Free Scan Tool

Why Do I Receive ~F066.tmp Error?

A temporary file (also known as temp file) like ~F066.tmp file is created to temporarily contain information while a new file is being made. Temporary files are closed and deleted when the program or a Windows session is closed normally. But if the program or the Windows session quits in an irregular way, the temp files are not closed and deleted.

However, some temp files are not deleted even when the program quits normally. This is due to programming errors which do not delete temporary file when a program is closed correctly. Then these files are accumulated on your system, which could lead to permission-related errors.

Popular ~F066.tmp Error Messages

  • ~F066.tmp - Entry Point Not Found.
  • ~F066.tmp - System Error.
  • ~F066.tmp - Application Error.
  • ~F066.tmp - Unable to Locate Component.
  • ~F066.tmp - Bad Image.
  • ~F066.tmp - Runtime Error.

You may receive ~F066.tmp error when you run or close Steam Support, start or shut down the computer, or use specific function of Steam Support. The time you encounter the error is very important to troubleshoot the problem.

Causes of ~F066.tmp Error

~F066.tmp error can be caused by plenty of reasons. The following are the most common causes of ~F066.tmp error.

  • There is a malfunctioning or faulty hardware in your computer.
  • ~F066.tmp file is infected with malicious adware, Trojans, spyware and malware.
  • The associated entries of ~F066.tmp are corrupted in the registry.
  • ~F066.tmp files are deleted by another program by mistake.
  • The software that uses ~F066.tmp is not downloaded completely and installed correctly.
  • Another program is in conflict with Steam Support and its shared files.

How to Fix ~F066.tmp Error?

If you're confident of fixing this problem yourself, we have listed several solutions to troubleshoot your ~F066.tmp problem.

Method 1: Uninstall and then reinstall Steam Support causing ~F066.tmp error.

If ~F066.tmp error pops up when you're using Steam Support, then it's worth trying to reinstall Steam Support or the program from Windows Software Developer.


Windows Vista, Windows 7 and Windows 10:

a. Click Start and click Control Panel.

start control panel windows 7

b. Click Uninstall a program.

win7 control panel programs and features

c. Look for Steam Support or the program from Windows Software Developer, right click on it and click Uninstall to uninstall it from your system.

uninstall software

d. After the uninstallation, restart your computer and then reinstall the software with your disc or the installer from the official website.

Windows 8 and 8.1:

a. Hover the cursor to the top right corner of the screen to bring up Charms bar and then click Search.

windows 8 charms bar search

b. Click Settings, type uninstall, and click Uninstall a program in the search results.

uninstall windows8

c. Look for Steam Support or the program from Windows Software Developer, right click on it and click Uninstall to uninstall it from your system.

uninstall software windows8

d. After the uninstallation, restart your computer and then reinstall the software with your disc or the installer from the official website.

Method 2: Replace corrupted system files with System File Checker.

System File Checker is a utility integrated in Windows system to help users easily scan and replace corrupted system files which may include files related to ~F066.tmp. If a "protected" file is modified or missing, this utility will restore it from a cached copy to ensure Windows work correctly.


a. Open an elevated command prompt.

Windows Vista and Windows 7

Click Start, click All Programs, Accessories, and then right click Command Prompt and click Run as administrator.

command prompt windows 7

Windows 8, Windows 8.1 and Windows 10

Open Win X menu by holding Windows and X keys, and then click Command Prompt (Admin).

windows8 win x menu

b. After confirming the UAC prompt, type sfc /scannow in the Command Prompt and hit Enter.

sfc windows 7

c. System File Checker is scanning your system and takes some time to complete the repair.

Method 3: Run a virus scan.

Malware infection is one of the most popular cause of various computer problems like ~F066.tmp error. Computer malware can make their way into the system, change system settings and corrupt system files. When this happens, Steam Support and Windows becomes more prone to ~F066.tmp error and even malfunction.


a. Restart your system into Safe Mode with Networking.

b. Open your antivirus or antispyware program. (You can also use this recommended malware detect tool)

c. Run a full scan for your system.

d. After the scan completes, either quarantine or remove any detected malware.

e. Restart your system.

Method 4: Replace corrupted hardware devices.

If your ~F066.tmp error cannot be fixed after you tried the above methods, then it may be caused by hardware failure. As for hardware failure, you need to replace a new piece of hardware device to fix your problem.

Method 5: Install Windows updates.

Computers and computer software can quickly become out-dated, so Microsoft keeps releasing updates in order to improve their security and fix technical glitches. Your ~F066.tmp error may be fixed after you install all latest Windows updates.


a. Go to the desktop of your system, right click on Computer and click Properties.

computer properties

b. In the left pane, click Windows Update.

windows update

c. In the Windows Update window, click Check for updates.

check for updates windows 7

d. If any update is found, click Install updates to install.

install updates windows 7

Method 6: Restart your computer.

You can try restarting your computer to fix ~F066.tmp error, as sometimes ~F066.tmp error may be temporary and can be fixed after a system restart.

Method 7: Repair corrupted Windows registry.

As the most important part of Windows operating system, Windows registry is a place that stores all information and configurations of software and hardware. A problematic registry is one of the most common causes of computer errors like ~F066.tmp error. Software installation, uninstallation, malware infection can make changes to the registry. Over time, more and more invalid entries are left and accumulated in the registry and then lead to various errors and problems. The registry needs regular maintenance to keep it tidy and stable. Manual editing the registry is not practical for people with no computer expertise, it's recommended that you use a registry cleaner to do this job.


Note: It requires certain computer knowledge to perform the above solutions. If you're not comfortable with this process, it's recommended that you download and run this automatic error fix utility to fix your PC problems automatically:

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Does ~F066.tmp error still persist?

Feel free to contact us for more assistance.

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