Well sorry for the "shouting", but i am in a training program and the sort of software im interesting in is for troubleshooting computers, good anti malware programs, etc.
There are plenty of excellent Tech tools available for System and Hardware diagnosis and repair.
SIW
Belarc Advisor
Everest
D_A_L Hardware Scan (for XP)
SysInternals Utilities
CodeStuff Starters
and many more from MS Windows and other hundreds of third-party publishers
Most "Windows" problems can be resolved using native utilities available from Microsoft.
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As to Malware Diagnosis and Removal…
Only those Members who have completed the necessary Training and have been Certified by WTT are allowed to use Advanced Malware Removal Diagnostic and Removal tools.
If you are wanting to learn about setting up user machines with proper protection "for Prevention"… have a look here: