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File version :
Description : PC/SC IFD handler for ACR91
Product Version :
Product Name : PC/SC IFD handler for ACR91
Company Name : Advanced Card Systems Ltd.
Internal name : ACR91WDM
File Size: 39350 byte(s) 38.438 KB
MD5 : 7983cef59d15fd0c6dc4329a5b6a75c6
SHA1: D8814DD1A1BD73B7DF916AB298578454FA5E153B

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How to Install acr91wdm.sys
Repair Sys ProblemsFixing a corrupted or missing acr91wdm.sys error is an easy process with a few steps. Open the zip-file you downloaded.Extract the .sys file to a location on your computer. We recommend you to unzip the file to the directory of the program that is requesting the file.
If that doesn't work, you will have to extract the file to your system directory.
By default, this is C:/WINNT/system32/drivers (Windows NT/2000).
or C:/Windows/system32/drivers (Windows XP, Vista, 7).
Make sure overwrite any existing files (but make a backup copy of the original file)
That should be it. Although not necessary you can reboot your computer as well.