Question : BSOD Win32k.sys Address BF81462B about 4 times a day

Dell Dimension3100 Win XP pro. Gets BSOD about 4 times a day has the following error messages:

0x0000005, 0xBF81462B, 0XAA4B4290, 0X00000000 Win32k.sys Address BF81462B, Base at BF 800000, Date Stamp 48 ce4dA7

Answer : BSOD Win32k.sys Address BF81462B about 4 times a day

This minidump and the attached one are different. The last one is about STOP 0x0A, a hardware / driver error, caused by iexplore.exe. The previous one was 0x50, a driver error, caused by update.exe.

If this is true  - BSODs with ever changing codes -  I'm willing to say it is a memory (RAM) failure, less probably hard disk (virtual memory, page file) failure.