internet explorer help

[Prelude008]

Hi,

I am a long time explorer user and have never had problems with it until I had my computer upgraded. I added a new motherboard and CPU, a DVI graphics card and new memory. Ever since these upgrades were made I have been getting constant "Internet Explorer Not Responding" errors with the option to end task. Everything freezes up (explorer and web pages) I surf the net while playing poker and it happens 4,5,6+ times a night. Is this common?

The friend who upgraded my computer says that it explorer is buggy and to use firefox. Doesn't make sense since I never had an explorer problem until the upgrade.

Someone at work says that it is possible that some registries (components) of the memory or proccessor may be defective.

I am at a loss. Has anyone had this problem and/or have suggestions on how I can solve them. Thanks!