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To quickly resolve your problem, we recommend download and use usrrtosa.dll Fix Tool. If you have technical experience and you want to install a DLL file manually, please select your version of Windows and download usrrtosa.dll, after that copy it to the appropriate place using the instruction below, it will fix dll errors.

What is Usrrtosa.dll ?

usrrtosa.dll - dll file called "3crtos" is a part of U.S. Robotics Modem Driver program developed by U.S. Robotics Corporation.

Some applications or games may need this file to work properly. If usrrtosa.dll is missing, whenever you start the application/game you may experience various kinds of errors. To fix those errors, please read the Recommended Solution below.

File version: 4. 11. 21

File size: 76.06 KB

MD5 file sum: B1AF33B72469EF50F64AE1962074EF94

SHA1 file sum: 7BC1375D50D3295940623963787C0C1ED84F5B1B

Usrrtosa.dll Error Screenshot

usrrtosa.dll missing

Possible error messages regarding this file:

usrrtosa.dll is missing

usrrtosa.dll error loading

usrrtosa.dll crash

usrrtosa.dll was not found

the procedure entry point usrrtosa.dll

usrrtosa.dll could not be located

usrrtosa.dll Access Violation

Cannot find usrrtosa.dll

Cannot register usrrtosa.dll

Recommended Solution to Fix Dll Error

To fix errors related with .DLL file you need to download usrrtosa.dll and copy it to the installation folder of the application or game, or copy it into the Windows system folder and it should fix the error. If you don’t know how to install this file, please read our tutorial about How to install DLL files.


Version / BitsSizeMD5/SHA-1
324. kb

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