This is the second file of two you will need. The other file has also been uploaded to driverguide, who do not allow files to exceed 10Mb. Place this and the other file in a subdirectory and type "pkzipc -extract -directories hp2100c.zip". Get pkzipc from www.pkware.com. You'll then get the files you need. If the first setup.exe doesn't work, use setup.exe from the "English" subdirectory instead. This will install PrecisionScan LTX. Windows will need to find the .inf and other files after you plug in your USB cable. Sorry you have to download nearly 20Mb, but HP has gone for bloatware in a big way. Normally you also get ScanToWeb on the CD too but that was even more stuff. Good luck.