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Currently, a friend's PC is lagging like mad. As it is an ageing system (a bog-standard Compaq Presario S5500UK), I cannot rule out a hardware issue, especially as I completely reformatted the thing less than 3 months ago (OK, so my friend isn't the best at looking after PCs), so I would like a system diagnosis program. Yes, I haven't run a virus scan yet, but I want all the tools to be to hand when I go to fix it.
Regards,
Luke
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Memory checking programs are not adequate because they don't test the memory the way that Windows uses it. Most, if not all, memory checkers use read/write cycles when scanning memory. Since Windows is executing code from the memory, it uses execute cycles. Execute cycles are physically different from read/write cycles and are more vulnerable to parity errors. It is possible for memory checking programs to find parity errors if the memory is extremely faulty.
The only satisfactory way of testing RAM is to test the installed RAM in various configurations. If you have a single module swap it around the slots. If you have a pair of modules run each one singly, swapping between slots; then run them in pairs swapping between pairs of slots. If you have 2 sets of matched modules do not get them mixed up.
