Suddenly, when I scan on the flatbed, the scanner does not stop after completing the first scan...it starts up again and repeatedly scans the same document until I push the stop button many times...with the sheet feeder it works fine with multiple pages...

You can try a 'hard reboot' of the unit by unplugging it while it is running, wait a minute or so and then restore the power.
With most electronics this forces a 'self-diagnostic' program which might fix the problem. Another option is to delete and them reinstall the software with a disc or online. Make certain that you have your machine set to automatically check for updates if it is connected to the Internet.

Hi

Scanning require disk space in you computer. Try to remove some clean up or remove some document files in your hard drive to free some space. Check also your C and D drive jf how much disk space it available.

Scan directly using Adobe software from computer

1 Position the first page of your document on the flatbed scanner and close the lid.

2 In Adobe Acrobat, under the File menu, choose "Create PDF", then "From Scanner" and then "Custom Scan."

3 In the Scan dialog box, choose your configuration settings. This will vary based on the nature of the document you wish to scan (e.g. color or black & white, images or text).

4 Click "Scan."

5 When the scanning process is complete, Acrobat will ask you if you wish to scan more pages into the file. If you do, position the next page on the flatbed scanner and click "Scan More Pages." Otherwise, click "Scan Is Complete."

6 Repeat the above steps as necessary to scan a multi-page document.

Read more: How to Scan a Document into a PDF ' eHow.com http://www.ehow.com/how_4895483_scan-document-pdf.html#ixzz18vbeLoUI

Follow these steps :
•1
Position the first page of your document on the flatbed scanner and close the lid.
•2
In Adobe Acrobat, under the File menu, choose "Create PDF", then "From Scanner" and then "Custom Scan."
•3
In the Scan dialog box, choose your configuration settings. This will vary based on the nature of the document you wish to scan (e.g. color or black & white, images or text).
•4
Click "Scan."
•5
When the scanning process is complete, Acrobat will ask you if you wish to scan more pages into the file. If you do, position the next page on the flatbed scanner and click "Scan More Pages." Otherwise, click "Scan Is Complete."
•6
Repeat the above steps as necessary to scan a multi-page document.

1. Position the first page of your document on the flatbed scanner and close the lid.
   
2. Step 2 In Adobe Acrobat, under the File menu, choose "Create PDF", then "From Scanner" and then "Custom Scan."
   
3. Step 3 In the Scan dialog box, choose your configuration settings. This will vary based on the nature of the document you wish to scan (e.g. color or black & white, images or text).
   
4. Step 4 Click "Scan."
   
5. Step 5 When the scanning process is complete, Acrobat will ask you if you wish to scan more pages into the file. If you do, position the next page on the flatbed scanner and click "Scan More Pages." Otherwise, click "Scan Is Complete."
   
6. Step 6 Repeat the above steps as necessary to scan a multi-page document.
   

Hello,
You may have activated the enlargment feature. Chek the configuration
Hope it helps

try reinstalling the scanner softwares and if this doesnot help do a master reset of the scanner

Bought a new scanner.

This could be due to excessive usage which the scanner can not tolerate and as a result the movement of the scanning mechanism losses precision. So avoid continous scanning.

The problem is simple.Someone or somehow the "TYPE OF ORIGINAL" option on ur SCANGEAR CS window.Set it back to "MAGAZINE" or "PHOTO" and it should scan in color.