Troubleshooting slowness of web application

Experts,

I will begin my journey to start using ASP.net.  The future plans are to migrate from an Access DB to MS SQL Server within a few months.
But in the meantime, I'm told the application is extremely slow for only a handful of users.  Apparently, the server has been upgraded and had not affect.

I could sure use some advice on how to troubleshoot so I could help to sold the 'slow' issue.

NOTE:  I could not, for some reason, remove the Apache Web Server topic.  It's actually in IIS.

Thank you.
Modifier1000Asked:
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Dave BaldwinFixer of ProblemsCommented:
If it is a public web site, you can check it on this page http://www.uptrends.com/aspx/free-html-site-page-load-check-tool.aspx to see what is slow loading.  Google has Pagespeed which is an addon for Firebug in Firefox that will do something similar.

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Modifier1000Author Commented:
Thank you!
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