Looking on the internet deeply has found these results:

on my PC is the most popular phrase on the web.

in my PC 116,100,000 results on the web	on my PC 119,600,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
kit and took my bolt cutters. So I took the keys for my PC I happened to see them in my PC. You've played with my PC? Wait, I can't think quickerthan my PC! 6, went to my tool It's like I've got my own mission control right here on my PC. If you'd brought my PC, I'd be twice as fast.	Do I have to set different parameters on my office PC and on my Notebook? No, the configuration is always the same, whatever PC and whatever connection you are using Why can't I use my own ISP's SMTP when I'm travelling? I happened to see them in my PC. You've played with my PC? So I took the keys for my PC 6, went to my tool Wait, I can't think quickerthan my PC! If you'd brought my PC, I'd be twice as fast. It's like I've got my own mission control right here on my PC.

in my PC

116,100,000 results on the web

on my PC

119,600,000 results on the web

More popular!

Do I have to set different parameters on my office PC and on my Notebook? No, the configuration is always the same, whatever PC and whatever connection you are using Why can't I use my own ISP's SMTP when I'm travelling?
I happened to see them in my PC.
You've played with my PC?
So I took the keys for my PC
6, went to my tool
Wait, I can't think quickerthan my PC!
If you'd brought my PC, I'd be twice as fast.
It's like I've got my own mission control right here on my PC.