How to identify the cause for slow performance

[anilkumar1988]

How to identify the cause for slow performance

[#2]

Task Manager and Performance Monitor are two tools that come to mind.

[#3]

@Dave Patrick  Thanks,

In my env one server got hang and rebooted, in this case how to check what caused for hang/slow perfomance.

[#4]

Check the event log for reboot error details. Performance Monitor may help you with other issues.

Windows Performance Monitor Overview - Microsoft Tech Community

[#5]

Just add make sure check the event viewer and you might find certain log files associated with this issue too.
Did you installed any program before this problem started?