I'm an old man and I'm not as up on these computers as you younguns. I've had a Samsung SCX-4100 printer/scanner for years. Always worked great. Old computer died an ugly death and I was forced to buy a new machine. Has Win 7 (had XP sp3). Samsung has a scanner utility called SmarThru 4. Used that to scan all the simple stuff I wanted to scan. Served the purpose. Now SmarThru 4 doesn't recognize the scanner. One odd thing though is that if you hit copy in the same utility it will scan and print. The printer part of the All-in-1 works perfectly. Try to scan normally and it says "Cannot open device." I have installed and uninstalled all the software and drivers for 2 full days now to no avail. I bought RegistryBooster here, uninstalled all the software, cleaned the registry and re-installed. Still the same. BTW Microsoft claims there are no compatibility problems with the SCX-4100. Any help would be greatly appreciated. This move to Win 7 has cost me a small fortune. Windows 7 Home Premium HP Pavilion p6520y. 8GB Ram (I added 2GB).