This will help if you installed an incorrect or mismatched driver. Try to set a system restore point before installing a device driver.
It is highly recommended to always use the most recent driver version available.
Digital Media Memory Card Compatibility: CompactFlash I & II, Sony Memory Stick, Memory Stick PRO, Secure Digital (SD) Card, MultiMediaCard (MMC), Microdrive, xD Card, Sony Memory Stick Duo (with adapter), Mini Secure Digital (Mini SD) Card (with adapter), Sony Memory Stick PRO Duo (with adapter), SanDisk TransFlash Memory Module (with adapter), RS-MMC (with adapter), xD Card Type M, Type H, MultiMediaCard (MMC) Mobile (with adapter), Micro Secure Digital (Micro SD) Card (with adapter) Standard Ports: USB 2.0 Specification Hi-Speed Certified (Type B), PictBridge Certified Port, USB pass-through via PictBridge port, 802.11g/b Wireless Duplex (2-sided) Printing: Integrated Duplex Print (ASF) Paper Output Capacity, Maximum: 25 pages 20 lb or 75 gsm bond ADF Paper Output Capacity: Up to 25 pages 20 lb or 75 gsm bond Media Types Supported: Card Stock, Coated Paper, Envelopes, Labels, Plain Paper, Banner (A4 or Letter), Hagaki Card, Iron-On Transfers, Photo Paper Media Sizes Supported: 10 Envelope, 7 3/4 Envelope, 9 Envelope, A4, A5, B5 Envelope, C5, Envelope, DL Envelope, 6 3/4 Envelope, A2 Baronial, A6 Card, B5, C6 Envelope, Custom (Up to 8.5 x 17", 216 x 432 mm), Hagaki Card, Index Card, Executive, Legal, Letter, 4 x 6", Statement, L, 2L, Chokei 3, Chokei 4, Chokei 40, Kakugata 3, Kakugata 4, Kakugata 5, Kakugata 6, 5 x 7", 13 x 18 cm, 10 x 15 cm, 10 x 20 cm, 4 x 8" Print (ASF) Paper Input Capacity, Maximum: 100 pages 20 lb or 75 gsm bond ADF Paper Input Capacity: Up to: 25 pages 20 lb or 75 gsm bond ADF Input Paper Sizes: A4, Legal, Letter Scan Resolution, Optical: 600 x 1200 dpi Scan Resolution, Enhanced: Up to 19,200 dpi ppi Time to First Copy (Black, Draft) as fast as: 7.2 seconds Time to First Copy (Color, Draft) as fast as: 17.1 seconds Maximum Copy Speed (Draft, Color): Up to: 23 cpm Maximum Copy Speed (Draft, Black): Up to: 24 cpm Maximum Print Speed (Draft, Color): Up to: 24 ppm Maximum Print Speed (Draft, Black): Up to: 28 ppm Print Resolution, Color: Up to 4800 x 2400 dpi Print Resolution, Black: Up to 1200 x 1200 dpi Color Technology: 4 Color Inkjet - Cyan, Magenta, Yellow, Black, Optional 6-Color Photo Printing Display: 16 character, 2-line backlit LCD Display Specified Operating Environment: Temperature:16 to 32☌ (60 to 90☏), Humidity: 8 to 80% Relative Humidity Product Certifications: Energy Star, FCC Class B, UL 60950 3rd Edition, CE Class B, CB IEC 6095-1, C-tick mark Class B, CCC Class B, CSA, ICES Class B, GS (TÜV), SEMKO Function: Color Copying, Color Printing, Color Scanning, Faxing