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Try to learn from the following book its free

Programming in C in 7 days - Free software downloads and software reviews - CNET Download.com

Best way uninstall and reinstall your printer driver

Is this problem occur after windows boots or it'll happening since computer starts?

Or you can reduce resolution to your monitor supported one.

Try to reduce refreshing rate in your game options or in windows monitor properties.

Or Scandisk with repair bad sector option checked.

May b you have bad sectors in your hard disk or try to use Disk defragmenter in system tools.

Does this machine connected with the computer?

Try to use operating compatibility option by right clicking on setup file and then selecting properties in pop up window there u have compatibility option select Windows ME from it. Then install...

You can use third party applications after installing scanner drivers to scan.
Such as ACDsee or Adobe photoshop or Ms Office document scanner bundled with Ms Office

Can u post more details here

TRY TO USE IF LOGIC
=IF(A1=0,"",IF(A1="",""))