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Hi @NessaChris,

Welcome to Trend Micro Home Users Community!

For inquiries regarding corporate products like Apex One, please contact our business support through this link: Trend Micro for Business | Contact Support

Hope this helps.

Hi @rayplacet,

Welcome to Trend Micro Community!

We tested helpcenter.trendmicro.com by typing it directly on the address bar and it's loading the help center page.

Kindly delete the browser cache images and files, and cookies and other site data, and check if the issue still persists.

Chrome: Clear cache & cookies - Computer - Google Account Help
Edge: How to Manage and Clear Your Cache and Cookies

You can also access our Trend Micro Help Center on this link: Support | Trend Micro Help Center

Hope this helps!