Windows 10 Slow and Fast-booting 50/50

This has been going on for a few months now. Sometimes when I power on the PC, Windows would take about 15 minutes to boot up. Other times it takes less than a minute. There's a 50/50 chance of it doing this. I've no idea why it just doesn't fast boot every single time. This is an old computer but it's pretty quick when it comes to work and web surfing. This is by no means a gaming PC. Is there a way to make it fast boot every single time? Here are the specs:

ASUS P5Q Pro Turbo Motherboard
Corsair 750 Watt Power Supply
Intel Core 2 Quad Q9550 Processor 2.83GHz
4 GB RAM
Windows 10 Pro x64
NVIDIA GeForce GTX 555

Will do.

Ok. So, it says that the hard disk status is perfect. No actions needed.

If you only use it for surfing net etc.. grab your self an ssd drive youl see a big boost on start up and browsing can get them preety cheap.now

DemolitionDan said:

If you only use it for surfing net etc.. grab your self an ssd drive youl see a big boost on start up and browsing can get them preety cheap.now

Yeah. That's a good idea. I will consider it. We're done here. Thx.

dalchina said:

hi, assuming you have fast startup enabled, suggests perhaps a difference between it using that and not. However, 15 mins is very long- too long,

Are you certain that when it takes 15 mins, it is not
- running chkdsk
- processing a Windows update
?

There's no UEFI for LGA 775 platform.

A Question: do you have any usb drives (which may have a boot sector, that can be booted from)?
Try unplugging them and any flash drives and remove sd card as well.
Check bios for boot order, and try to run Startup repair settings/update and security/recovery.
you might try clean boot start/run msconfig.exe

thomaseg1 said:

A Question: do you have any usb drives (which may have a boot sector, that can be booted from)?
Try unplugging them and any flash drives and remove sd card as well.
Check bios for boot order, and try to run Startup repair settings/update and security/recovery.
you might try clean boot start/run msconfig.exe

I have no USB drives and sd cards plugged in. I went into the System Configuration and selected Normal Startup. So far it has booted fast 4 times. I think this was the problem.