Long boot Windows XP from GRUB. What is the reason?

Question

linux

The laptop is running Windows XP, Ubuntu and Windows 7, using GRUB as the bootloader. From some point before loading Windows XP, a pause lasting about a minute began to occur.
When using the native XP bootloader, everything is fine, reinstalling and rolling back GRUB did not help. The rest of the systems boot normally.
What diagnostics can be carried out and what could be the reason for this behavior?
I remember that earlier problems of a similar nature arose on a stationary PC: at some point, the system simply began to load longer, no reinstallations helped. But as soon as the system was installed on another partition of the same disk, the brakes disappeared.

Answer 1

And if by hand (replacing with the desired section):

set root=(hd0,msdos3)
chainloader +1
boot

will there be a delay?

Answer 2

Try to find out with the help of boot process analysis utilities. For example bootvis.

Answer 3

The MB screw has already outlived its usefulness and broken blocks began to appear? What does SMART say? Because home series screws will stubbornly try to read the broken block. You can watch it all from Ubuntu - smartctl -a /dev/sda and badblocks can be run through it.