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File Version : v1.0.9
Description : NDIS 5.0 miniport driver
Copyright : TAMARACK MicroElectronics, Inc.2000-2003
Product Version : v1.0.9
Product Name : TAMARACK TC902x Based Gigabit Ethernet Adapter
Company Name : TAMARACK MicroElectronics, Inc.
Internal Name : RIO
File Size: 30336 byte(s) 29.640 KB
MD5 : b565562db623202960298ad4d748ecb8
SHA1: FBF860349B0DD0F795A0C8991C877B62A55F17DB

Download ptserial.sys
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How to Install ptserial.sys
Repair Sys ProblemsFixing a corrupted or missing ptserial.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.