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#21
Driver verifier will cause a crash if it encounters a faulty driver; that is the purpose. Upload those Verifier enabled dumps to us. Hopefully, the dumps will point to the offending driver(s). Even if the store is able to fix it, the dumps might hold a clue that can help someone else. I hope the shop can solve your problem. And please do let us know.
Regarding Memtest, download it again and make a new CD and try it. You might ask the shop to try it. From experience, we have found that Memtest needs to run for at least seven passes. Sometimes RAM errors do not show up on the first few passes. The shops around here run it for 12 passes.