Memory (?) errors from various programs

I'm using a genuine up-to-date Win7 Ultimate 64, I5 CPU, 8gb DDR2 RAM.

For a few days now, my programs have been crashing randomly when typing/copying/pasting text. First eclipse would instantly exit and now Notepad++, Opera and others are following it (with or without a "Has stopped working" dialog).

Memtest ran fine with 0% errors, I benchmarked the CPU as well for close to an hour (Prime95 4core). Checked C:\ drive with the built in disk checker and it was also okay.

Found this in the eclipse error logs (couldn't find anything useful by searching the web):

#
# A fatal error has been detected by the Java Runtime Environment:
#
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x001c377c, pid=3412, tid=1724
#
# JRE version: 7.0_17-b02
# Java VM: Java HotSpot(TM) Client VM (23.7-b01 mixed mode, sharing windows-x86 )
# Problematic frame:
# C 0x001c377c
#
# Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
#
# If you would like to submit a bug report, please visit:
# HotSpot Virtual Machine Error Reporting Page
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#

--------------- T H R E A D ---------------

Current thread (0x02d2ac00): JavaThread "main" [_thread_in_native, id=1724, stack(0x00090000,0x00190000)]

siginfo: ExceptionCode=0xc0000005, writing address 0x01e70000

Registers:
EAX=0x01e11a01, EBX=0x000001ce, ECX=0x01db36bb, EDX=0x01e11c1b
ESP=0x0018e568, EBP=0x00000410, ESI=0x01e70050, EDI=0x01e70000
EIP=0x001c377c, EFLAGS=0x00210216

Any ideas?

Thanks for the suggestion, but I almost never get BSODs (last one is from mid-2013).

The applications simply exit.