Article ID: 134503 - View products that this article applies to.
This article was previously published under Q134503
When you are running Windows 95, you may receive frequent (every 10 or 20 minutes) "Parity Error" messages on a blue screen. When you receive such a message, you must restart the computer.
Parity errors are usually caused by defective memory chips in the computer. For more information about parity errors, please see the following article in the Microsoft Knowledge Base:
93521Parity errors can also be caused by:
(http://support.microsoft.com/kb/93521/EN-US/ )Parity Errors in Windows 3.x
There are two methods you can use to identify whether defective memory chips are causing the problem:
(http://support.microsoft.com/kb/142546/EN-US/ )How to Use a RAM Drive to Troubleshoot Memory
(http://support.microsoft.com/kb/138788/EN-US/ )Bad RAM Causes Fatal Exception Errors Running Windows 95/98
Defective memory chips may not be detected by memory checking tools. Some memory checking programs are not adequate tests because they do not test RAM in the same way that Windows uses RAM. Most memory checkers use read/write cycles when scanning memory. Since Windows is executing code from memory, it uses execute cycles. Execute cycles are different from read/write cycles and are more vulnerable to parity errors. It is possible for memory checking programs to find parity errors if the memory is extremely faulty. Bad memory chips can also cause the following situations: