I repaired a PC with the same symptoms recently. The problem was an
intermittent cpu fan.
This is likely to be a heat or memory related problem.
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I have a PC, less than a year old, with Windows 98 SE OS, Celoron
processor and 160 MB memory (32 + 128;DIMM). The PC came with 32 the
128 was added later. Lately windows has been freezing or crashing
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