Has it always been that way? If it has, it could be your PC specs (not a very fast computer). The slow boot from POST to splash could be due to a number of things. What bad cable connection can it be? And how can it freeze by BIOS booting when plugging in an external USB keyboard? I gave up and am now used to waiting for that time. I tried many solutions to this like SFC/scannow and trying to disable all services while booting except Microsoft but nothing helped. There has been one odd problem for quite some time but I thought it was a software error.At the login screen of windows 7 when it says logging in the laptop hangs for about 30 seconds and then can I finally reach my desktop window. Thanks for the input and yes I did check the drivers and they all seem fine.

If that doesn't help, then it could be a bad cable connection, and if that is all fine, it could be the motherboard. You might want to try a system recovery (not a system restore- completely reset the PC- backup your data, save it to external hard drive, the cloud, wherever). You said the I/O controller was changed, and the fact that it didn't help tells me something else is wrong. One of the first things that went sally were the touchpad and keyboard 8( It's an HP, and I've owned 2 HP laptops and both died due to motherboard issues. Are you getting any error messages? Blue screens? Slow boots? That's usually the first place I look. Doesn't sound like a driver issue, but you might want to check.

Hp pavilion g6 keyboard not working