2 GB of memory should be enough indeed.

Out of virtual memory: could you post your virtual memory settings? There may be something there that could be improved.

Errors like IE having to close due to a C++ error is NOT good. Your computer might have contracted a virus - which also could be an explanation of your Poser troubles.

Another possibility is overheating. If the inside of your computer is clogged with dust, it won't cool, and overheating will get you those errors. Cleaning out the computer might help.
An extra case fan might also help keeping your machine cooler.
Modern machines often have temperature monitoring hardware on board. You can monitor the temperature by starting up your computer and hitting or (depends on the computer brand) to enter Setup. From there you can navigate to the Hardware Monitor. It'll tell you how hot the CPU is, how fast the fans are revolving, and so on.

A third possibility is a hard disk that's about to die horribly. Does the disk sound "strange", noisier than usual? Then it is time for a dash to the hardware store and get a new disk. Burn your data to a CD/DVD, or transfer them over a network to another computer, before installing the new disk.

The pen is mightier than the sword. But if you literally want to have some impact, use a typewriter

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