I could not fire up a winmodem under SuSE 9.1 in a notebook, so I had to completely remove Linux.

The system was as follows:
hda1 (primary) WindowsXP partition
hda2 (extended)
hda5...8 (logical volumes in the extended partition) Linux partitions

SuSE had GRUB in the mbr.

When I tried to remove SuSE, I made a fault: I opened up yast/system/bootup settings, and selected "restore a saved mbr" believing that SuSE had saved the mbr which had been there before it had installed Grub. In fact, SuSE automatically offered a backup date, which seemed to be the day when I installed SuSE, so I selected that and started the restore operation.

The problem: when restoring the mbr, SuSE did not remove Grub, just destroyed it, so that my system could no longer boot up; just printed this on the bootup screen:
GRUB
and the bootup process was stopped.

I removed the Linux partitions; booted up WinXP from its installation CD, and run FIXMBR.
This fixed the mbr, and now I can boot up in Win XP, but now WinXP shows me a "boot menu" at every startup, where I can select nothing but WindowsXP to start.
Since I have no more installed systems (SuSE has been removed), the WinXP boot menu is unnecessary and it just slows down the boot-ups.

So, my question is: is it possible to completely remove that WinXP "boot menu"? How?

(Yes, I know this is not a Win support site, but this question is closely related to Linux, as long as it could show me the last step of completely removing a Linux installation, so I hope you will help me.)

Try format /mbr instead to clear the mbr completely. Windows will become the borg and then re-assymalate the system.
But I really must say, deleteling linux because you couldnt get the win-modem to work?

Yeah, sounds logical. You could just go spend the 5-10 dollars on ebay and actually buy a decent modem...

Find file boot.ini in your Win Drive,
edit it, make sure you have only one Windows Entry, in default section, and on in
[operating system] section

I will do it when I have the notebook in my hands the next time, but I doubt that this will help as I already run BOOTCFG and selected WinXP as the system to start, but I still get the boot menu. (BOOTCFG is to edit boot.ini)

You should not say anything when you do not know the background. It was not my notebook but my boss's. He insists on Windows, and it was only my initiative to install Linux for solely safe internet browsing and e-mail.
Besides, it is not so easy to replace an onboard modem in a notebook, and a "good" modem costs much more than 5-10 bucks.
And I must say, it was VERY frustrating for ME to remove a completely configured Linux installation just because I could not fire up that modem with more than 20 hours of efforts. (I was able to install several winmodems under Linux in the past, but this one has proven to be a hard one.)

" and a "good" modem costs much more than 5-10 bucks."

I have 2 Zoom .v92 56k pcmcia modems with lightning guard protection. Both of them work perfectly with linux. Both of them cost less than 10$ on ebay.