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File Version : 6.1.7600.16393 (win7_gdr_oob_vpc(wmbla).090922-1813)
Description : Virtual PC Host Bus Driver
Copyright : Microsoft Corporation. All rights reserved.
Product Version : 6.1.7600.16393
Product Name : Virtual PC Host Bus Driver
Company Name : Microsoft Corporation
Internal Name : vpchbus.sys
File Size: 165376 byte(s) 161.512 KB
MD5 : 33e74df34753fcaab06f6f2bdc8cabf5
SHA1: A7A6955731E9232586F6F52165C73EB4E8AB26B6

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How to Install VIAUDIOS.SYS
Repair Sys ProblemsFixing a corrupted or missing VIAUDIOS.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.