Windows 7 Compatible Product (Driver you can use)
Before installing any unknown driver from internet you should check whether your lexmark product is windows 7 compatible or not. Lexmark and Microsoft are providing drivers for most of Lexmark business products. You can get a list of Lexmark products, their compatibility with windows 7 and windows 7 driver list provided by Microsoft and Lexmark.

Here is list of Lexmark printers/products and windows 7 driver for respective product.

Forms Printer 2480 (Use Vista OS Driver)
Forms Printer 2481 (Use Vista OS Driver)
Forms Printer 2490 (Use Vista OS Driver)
Forms Printer 2491 (Use Vista OS Driver)
Forms Printer 2580 (Use Windows 7 OS Driver)
Forms Printer 2581 (Use Windows 7 OS Driver)
Forms Printer 2590 (Use Windows 7 OS Driver)
Forms Printer 2591 (Use Windows 7 OS Driver)
Forms Printer 4227 Plus (Use Vista OS Driver)
C510 (Use Windows 7 OS Driver)
C520 (Use Windows 7 OS Driver)
C522 (Use Windows 7 OS Driver)
C524 (Use Windows 7 OS Driver)
C530 (Use Windows 7 OS Driver)
C532 (Use Windows 7 OS Driver)
C534 (Use Windows 7 OS Driver)
C540/3/4 (Use Lexmark Driver)
C720 (Use Windows 7 OS Driver)
C734/6 (Use Lexmark Driver)
C750 (Use Windows 7 OS Driver)
C752 (Use Windows 7 OS Driver)
C760 (Use Windows 7 OS Driver)
C762 (Use Windows 7 OS Driver)
C770 (Use Windows 7 OS Driver)
C772 (Use Windows 7 OS Driver)
C780n (Use Lexmark Driver)
C782n (Use Lexmark Driver)
C910 (Use Windows 7 OS Driver)
C912 (Use Windows 7 OS Driver)
C920 (Use Windows 7 OS Driver)
C935 (Use Lexmark Driver)
E120 (Use Vista OS Driver)
E120n (Use Vista OS Driver)
E220 (Use Windows 7 OS Driver)
E230 (Use Windows 7 OS Driver)
E232 (Use Windows 7 OS Driver)
E234 (Use Windows 7 OS Driver)
E234n (Use Windows 7 OS Driver)
E238 (Use Windows 7 OS Driver)
E240 (Use Windows 7 OS Driver)
E250d (Use Windows 7 OS Driver)
E250dn (Use Windows 7 OS Driver)
E260/d/dn (Use Lexmark Driver)
E360d/dn (Use Lexmark Driver)
E460dn/dw (Use Lexmark Driver)
E320 (Use Windows 7 OS Driver)
E321 (Use Windows 7 OS Driver)
E322 (Use Windows 7 OS Driver)
E323 (Use Windows 7 OS Driver)
E330 (Use Windows 7 OS Driver)
E332n (Use Windows 7 OS Driver)
E340 (Use Windows 7 OS Driver)
E342n (Use Windows 7 OS Driver)
E350d (Use Windows 7 OS Driver)
E352dn (Use Windows 7 OS Driver)
E450dn (Use Windows 7 OS Driver)
Optra C710 (Use Windows 7 OS Driver)
Optra Color 45 (Use Windows 7 OS Driver)
Optra E (Use Windows 7 OS Driver)
Optra E+ (Use Windows 7 OS Driver)
Optra E312 (Use Windows 7 OS Driver)
Optra E312L (Use Windows 7 OS Driver)
Optra EP (Use Windows 7 OS Driver)
Optra K 1220 (Use Windows 7 OS Driver)
Optra M410 (Use Windows 7 OS Driver)
Optra M412 (Use Windows 7 OS Driver)
Optra N (Use Windows 7 OS Driver)
Optra R Plus Series (Use Windows 7 OS Driver)
Optra S 1250 (Use Windows 7 OS Driver)
Optra S 1255 (Use Windows 7 OS Driver)
Optra S 1625 (Use Vista OS Driver)
Optra S 1650 (Use Windows 7 OS Driver)
Optra S 1855 (Use Vista OS Driver)
Optra S 2420 (Use Vista OS Driver)
Optra S 2450 (Use Vista OS Driver)
Optra Se 3455 (Use Windows 7 OS Driver)
Optra T610 (Use Windows 7 OS Driver)
Optra T612 (Use Windows 7 OS Driver)
Optra T614 (Use Windows 7 OS Driver)
Optra T616 (Use Windows 7 OS Driver)
Optra W810 (Use Windows 7 OS Driver)
OptraImage C710sx (Use Windows 7 OS Driver)
OptraImage W810s (Use Windows 7 OS Driver)
T420d (Use Windows 7 OS Driver)
T430 (Use Windows 7 OS Driver)
T520 (Use Windows 7 OS Driver)
T520 SBE (Use Windows 7 OS Driver)
T522 (Use Windows 7 OS Driver)
T620 (Use Windows 7 OS Driver)
T622 (Use Windows 7 OS Driver)
T630 (Use Windows 7 OS Driver)
T632 (Use Windows 7 OS Driver)
T634 (Use Windows 7 OS Driver)
T640 (Use Windows 7 OS Driver)
T642 (Use Windows 7 OS Driver)
T644 (Use Windows 7 OS Driver)
T650/2/4 (Use Windows 7 OS Driver)
W812 (Use Windows 7 OS Driver)
W820 (Use Windows 7 OS Driver)
W840 (Use Windows 7 OS Driver)
W850n/dn (Use Windows 7 OS Driver)
X203/4n (Use Windows 7 OS Driver)
X264dn (Use Windows 7 OS Driver)
X363dn (Use Windows 7 OS Driver)
X364dn (Use Windows 7 OS Driver)
X364dw (Use Windows 7 OS Driver)
X340 (Use Windows 7 OS Driver)
X342n (Use Windows 7 OS Driver)
X422 (Use Windows 7 OS Driver)
X463de (Use Windows 7 OS Driver)
X464de (Use Windows 7 OS Driver)
X464dte/dtwe (Use Windows 7 OS Driver)
X500n (Use Windows 7 OS Driver)
X502n (Use Windows 7 OS Driver)
X520 (Use Windows 7 OS Driver)
X522 (Use Windows 7 OS Driver)
X543/4 (Use Windows 7 OS Driver)
X560n (Use Windows 7 OS Driver)
X630 (Use Windows 7 OS Driver)
X632 (Use Windows 7 OS Driver)
X632e (Use Windows 7 OS Driver)
X632s (Use Windows 7 OS Driver)
X634e (Use Windows 7 OS Driver)
X642e (Use Windows 7 OS Driver)
X644e (Use Windows 7 OS Driver)
X646e (Use Windows 7 OS Driver)
X646ef (Use Windows 7 OS Driver)
X651de (Use Windows 7 OS Driver)
X652de (Use Windows 7 OS Driver)
X654de (Use Windows 7 OS Driver)
X656de (Use Windows 7 OS Driver)
X658de (Use Windows 7 OS Driver)
X860e (Use Windows 7 OS Driver)
X862e (Use Windows 7 OS Driver)
X864e (Use Windows 7 OS Driver)
X720 (Use Windows 7 OS Driver)
X734de/th/he (Use Windows 7 OS Driver)
X736de/th/he (Use Windows 7 OS Driver)
X738de/th/he (Use Windows 7 OS Driver)
X750e (Use Windows 7 OS Driver)
X752 (Use Windows 7 OS Driver)
X672e (Use Windows 7 OS Driver)
X772e (Use Windows 7 OS Driver)
X782e (Use Windows 7 OS Driver)
X820e (Use Windows 7 OS Driver)
X830e (Use Windows 7 OS Driver)
X832e (Use Windows 7 OS Driver)
X850e (Use Windows 7 OS Driver)
X852e (Use Windows 7 OS Driver)
X854e (Use Windows 7 OS Driver)
X912e (Use Windows 7 OS Driver)
X940e (Use Lexmark Driver)
X945e (Use Lexmark Driver)

Windows 7 Drivers | Windows Vista Drivers | Windows XP Drivers