Best all around diagnostic software.

This oughta be an easy one. I own a break/fix computer business and have found alot of answers on this site and thought it would be helpful to find what software most of the experts here are using for diagnosing all kinds of PC problems; HD, memory, processor, Windows errors etc. Thanks and Happy 4th.
mpcmAsked:
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mwnnjCommented:
hi,
regarding hardware:
-RAM:
memtest86+  www.memtest.org  free
-RAM,CPU,NET etc.:
MicroScope from Micro 2000 ,but costs
also see BurnINTest from Passmark
http://www.passmark.com/products/bit.htm

regharding hardware also software ,but more informative/benchmarking/system optimizing:
Everest Home edition www.lavalys.com free
Sisoft Sandra 2005 http://www.sisoftware.co.uk/index.html?dir=&location=downandbuy&langx=en&a=     free
Astra32  http://www.astra32.com/
Unknown devices  http://www.halfdone.com/Development/UnknownDevices/
other good tools are windows system based tools such as eventviewer,msinfo32,device manager
for networking common tools such as netstat ,ipconfig

monitoring tools:
Motherboard monitor http://mbm.livewiredev.com/  requires cpu and motherboard sensors



cu
_Commented:
I like/use this one:
Ultimate Bootdisk and diag utils:
http://ultimatebootcd.com

Another one:
Knoppix <can get it here>
http://linuxiso.org/
mpcmAuthor Commented:
Thanks for the advice. I'm checking them out now. I increased the value so I can split them among you experts.
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_Commented:
Word of warning, if you are not use to DOS type commands, UBCD might be a little confusing at first. But worth the learning curve.     : )
mpcmAuthor Commented:
I'm comfortable with DOS, but could always learn more. Thanks.
nobusCommented:
Here some more links to useful progams :

http://www.drivermagic.com/p/nph-home.php                              Driver magic for driver problems
http://www.protechdiagnostics.com/toolstartest.htm
http://www.pc-doctor.com/                                                                PC doctor
http://www.pctestpro.com/
http://www.simmtester.com                                                                memory test
http://www.winsite.com/bin/Info?5000000036483                    Dr Hardware
http://www.modemdoctor.com/                                 modem doctor
http://www.driverguidetoolkit.com/                                                    driver guide Toolkit

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mpcmAuthor Commented:
Thanks to all for your help. Hope I can return the favor.
_Commented:
Thank you much.    : )
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