(1).running in your system or application system reported error: unable to control A20 line memory write / read failure or the memory allocation error, etc. What is going on?
   These problems are failures of memory errors, which reduce the memory / memory parity errors and different system memory error is reported in three cases, respectively, from different causes;
1. Power On Self Test RAM error Times,
Caused the failure was mainly attributable to the memory or the memory controller hardware failure.
2. In the CMOS set up a self-start system is not more than 1M of memory, running applications in the system memory error is reported,
  Caused by the failure may be due to memory or memory controller hardware failure, software failure may also be
3. Power On Self Test to enter DOS or Windows through the platform to run applications in memory error Times
Caused by the failure of the main reasons for software failure.

(2).software failure caused by an error of memory may be the following steps to check and deal with

1, if it is running in DOS environment Times application memory error,
  Memory allocation error checking, DOS and run the application whether or not the conflict, and to deal with the corresponding.
this Are generally identified by the system or restart the system configuration file rewrite to solve,
On the application procedure can be adopted to solve the corresponding changes.

2.if it is in the Windows environment to run application error memory Times
Check whether the application caused the illegal access memory,
Memory in general may be the presence of clear procedures, reducing the active window, adjusting the configuration program or re-installation of systems and applications to solve.

3.If the problem is running a special application only may be caused by the software

4.with anti-virus software to scan for viruses

the more common memory error caused by Hardware failure:

CMOS settings wrong, bad memory, the installation of assembly memory errors, hardware damage memory, memory controller memory error will cause an error, etc.