In Some PCs the words becomes too small that noone can read it!!!Help me!!

I’m haveing a problem that i found out today!!

I’m doing a Blog and i gave the Blog’s link to my mother see it.

She told me that the words were too small!! But for me at my place everything were ok…

Today i arrived at my old home… and i got in my Blog… when i did it, i understood what mom was telling me!!

In some PCs the words of the blog are too small that noone can read!!

I wanna know if someone has, or had, the same problem and what can i do to fix it??

Sore for my english… i’m brazilian!!

Wainting a answer,
Kriskohr