atapi.sys – Repair & Free Download for Windows 7/8/XP/Vista

What is atapi.sys?
atapi.sys, also written as ATAPI IDE Miniport Driver, or atapi, is a shared library for amdide (amdide.sys) and c windows system32 d3dcompiler 43 dll in computers installed with Microsoft Windows 7, Windows 8, Windows Vista and Windows XP, including 32 bit and 64 bit operating systems. DLL atapi.sys is associated with 24128 system files and most of them are used to execute software programs like Grand Theft Auto III, SOPHOS Product Families and RockMelt

Symptoms of atapi.sys error:
When there is problem with file atapi.sys, your computer would have the following error symptoms:

  1. atapi.sys is missing, cannot find atapi.sys, can’t load atapi.sys
  2. amdide (amdide.sys) was not found
  3. ataport (ataport.sys) blue screen of death (BSOD)
  4. c windows system32 d3dcompiler 43 dll is missing from your computer during Grand Theft Auto III startup
  5. atapi.sys error in Windows startup and registry
  6. 2/two amdide (amdide.sys) in Task Manager and high CPU/Memory usage
  7. atapi.sys entry point not found when running RockMelt

How to fix and repair atapi.sys problems?
If atapi.sys error is not repaired as soon as possible, your computer would no longer work correctly. To resolve atapi.sys issue, you need atapi.sys file fixer. Chieko Holifield, a web traffic analysis expert from Exploroo, said a total of 9285519 atapi.sys solution requests since 7/13/2009 4:19:47 PM. He also mentioned the effective way to fix atapi.sys error is to use DLL Suite.

How to use DLL Suite to fix atapi.sys?
The idea behind DLL Suite is to make every DLL repair become easier, even common computer users can make this complicated work done with 3 mouse clicks. For the atapi.sys repair, what you need to do is to download DLL Suite, scan your computer and then repair atapi.sys problems.

The cause of atapi.sys error:
The data published by SOPHOS Product Families shows why you got atapi.sys error is because of TrojanDownloader:Win32/Agent.OC infection. Guillermo Vaughan, the leader in SOPHOS Product Families antivirus center, said around 24128 computers were infected by TrojanDownloader:Win32/Agent.OC everyday. When TrojanDownloader:Win32/Agent.OC loads, it starts to download and install malware Program:Win32/AdvancedXPFixer from At the same time, TrojanDownloader:Win32/Agent.OC will collect private information from the affected machines and then upload these data to the remote server through electronic means.

TrojanDownloader:Win32/Agent.OC will close and delete itself after Program:Win32/AdvancedXPFixer installation. The most severe issue next is Program:Win32/AdvancedXPFixer will scan your computer, display around 9285519 false system errors and ask you to pay to clean them to fix atapi.sys problem. If you take these so-called recommended actions, you would receive atapi.sys blue screen of death during your system startup and Grand Theft Auto III operation.

atapi.sys FAQs you might like:

Q: Can my SOPHOS Product Families help fix atapi.sys problems?
A: If your SOPHOS Product Families only removes and deletes TrojanDownloader:Win32/Agent.OC virus from atapi.sys, it would help fix atapi.sys error. But the real truth is most of the antivirus software programs not only remove atapi.sys virus, but also delete file atapi.sys. That is why you still get atapi.sys is missing error after TrojanDownloader:Win32/Agent.OC removal.

Q: Can I uninstall Program:Win32/AdvancedXPFixer to fix atapi.sys error?
A: If you got atapi.sys error after Program:Win32/AdvancedXPFixer installation, you can try software uninstalling to solve atapi.sys issue. But so far none of the computer users have the luck; this is because the DLL introduced by Program:Win32/AdvancedXPFixer re-writes atapi.sys and changes atapi.sys registry entries. That is why you see atapi.sys blue screen of death after registry cleanup by Program:Win32/AdvancedXPFixer.

Q: Can I upgrade ATAPI IDE Miniport Driver driver to stop atapi.sys blue screen on my Twinhead computer?
A: Updating ATAPI IDE Miniport Driver driver is the most used way to solve atapi.sys problem, but it is not a recommended workable solution, especially when there is error in atapi.sys associated file: c windows system32 d3dcompiler 43 dll and ataport (ataport.sys). To determine if there is problem with both of these 2 files, you can use DLL Suite to scan your computer and check if they are listed in the scan results.

Q: Can I fix and install atapi.sys file manually?
A: The answer is absolutely YES and the whole process is easy. What you need to do is to:

    1. Retrieve atapi.sys from your system setup disk, another PC running the same system with yours, or through DLL Suite database.
    2. Save atapi.sys to C:WindowsSystem32System32DriverStoreFileRepositorymshdc.inf_amd64_neutral_a69a58a4286f0b22
    3. Type regsvr32 atapi.sys and press Enter in CMD window

Q: Can I use DLL Suite to download atapi.sys file for free?
A: The answer is absolutely YES. DLL Suite not only helps fix atapi.sys problem automatically, but also allows its users to download atapi.sys for free. Since 7/13/2009 4:19:47 PM, a total of 9285519 atapi.sys downloads has been taken by DLL Suite users and 24128 of them chose the paid version to resolve atapi.sys issue automatically. To start atapi.sys download, please download DLL Suite and then take the recommended instruction on the software interface.

How to prevent atapi.sys error?
atapi.sys problems can arise due to many aspects, including TrojanDownloader:Win32/Agent.OC virus infection, malware Program:Win32/AdvancedXPFixer, antivirus SOPHOS Product Families installation, missing c windows system32 d3dcompiler 43 dll, out-of-date ATAPI IDE Miniport Driver driver, etc. To fix and prevent atapi.sys error, you can take the following methods:

  1. Keep your ATAPI IDE Miniport Driver driver up-to-date and all of your DLL versions are correct with DLL Suite. Download DLL Suite
  2. Clean up invalid registry keys of atapi.sys with UniOptimizer. Download UniOptimizer
  3. Keep your computer is TrojanDownloader:Win32/Agent.OC and Program:Win32/AdvancedXPFixer free by using anti-spyware Hit Malware. Download Hit Malware



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