Epson 440, 600, 640, 700, 800, 850, 1520, 3000, EX User Manual page 20

Deleting the INF file for the old printer driver
1 Click Start, point to Programs, and select Windows Explorer.
2 Open your Windows directory. If you see an Inf folder, go to step 5.
Otherwise, continue with step 3.
3 From the Windows Explorer View menu, select Folder Options. The
Folder Options dialog box opens.
4 Click the View tab. Under Hidden files, select Show all files. Click
Apply to save the setting, then click OK to close the Folder Options
dialog box.
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