Irregular behavior when installing Fonts in Windows 7

Question

Hi everyone.
When i install a font in Windows 7, the fonts behave irregularly.
For instance, if I install the font family of Helvetica, write some normal text and turn the text into bold, it turns into italic instead of bold. And when I click the Italic button, it turns into Bold Italic. Why this happens?
Secondly, whenever I install a new font, and restart my PC, the "Segoe UI" changes to "Arial" or "Tahoma". To fix this, I have to reboot 2-3 times again. Please tell me how to solve this problem.
Thank you.

Answer 1

@Xiaowei He
Yes it also exists in clean boot. :(

Answer 2

@Xiaowei He
Yes, I have Malwarebytes Free installed. I tried uninstalling it, no help.
So I reinstalled it again.

Answer 3

Hi，

Please check if there's any anti-virus application running on the system, if yes, please uninstall it and test.

Please check if the issue still exists in clean mode. Please try to do a clean boot of the system:

https://support.microsoft.com/en-us/help/929135/how-to-perform-a-clean-boot-in-windows

Thanks for your time!
Best Regards,
Anne

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