<div>
Your friend needs to look at which sata port his Windows is plugged into (it should say sata 1, sata2, sata3 etc) then set that disk as the first disk in the boot sequence.<br />
<br />
are you able to show us disk management..?<br />
Then I can help further.
</div>


Your friend needs to look at which sata port his Windows is plugged into (it should say sata 1, sata2, sata3 etc) then set that disk as the first disk in the boot sequence.

are you able to show us disk management..?
Then I can help further.

<div>
Hi There,<br />
<br />
already found the root cause. Users plugged in a usb drive and someone had changed the bios setting to boot usb as priority.<br />
<br />
Thanks for all the advise and reference. <br />
<br />
Thanks alot
</div>


Hi There,

already found the root cause. Users plugged in a usb drive and someone had changed the bios setting to boot usb as priority.

Thanks for all the advise and reference.

Thanks alot

<div>
<div class="content wysiwyg-content">
Hi Expert, <br />
<br />
asking this for my friend,<br />
<br />
he is experince this error message while the windows updates done(win2k8r2)<br />
<br />
&quot;operating system not found&quot; while reboot the server<br />
<br />
try reboot several times but still get the same message, <br />
<br />
then, he check the bios for the disc health, seems fine, and after that,<br />
<br />
he put the win2k8r2 disc and boot into the window installer screen,<br />
<br />
attached with hard disk in bios and windows installer disk selection screen,<br />
<br />
he personally suspect the boot sequence wrong, but after reboot, the windows back to normal.<br />
<br />
he is worry that the similar issue will keep on repeat after second reboot or windows updates, <br />
<br />
he would like to seek advise for this.<br />
<br />
Thanks<br />
<a href="https://filedb.experts-exchange.com/incoming/2014/04_w15/844774/2014-04-10-09.22.58.jpg" target="_blank" class="file-inline" title="Windows Disk Sequence (2.7 MB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>2014-04-10-09.22.58.jpg</a><br />
<a href="https://filedb.experts-exchange.com/incoming/2014/04_w15/844775/2014-04-10-09.19.01.jpg" target="_blank" class="file-inline" title="Bios Disk Sequence (2.8 MB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>2014-04-10-09.19.01.jpg</a>
</div>
</div>


2014-04-10-09.19.01.jpg

2014-04-10-09.22.58.jpg

Hi Expert, 

asking this for my friend,

he is experince this error message while the windows updates done(win2k8r2)

"operating system not found" while reboot the server

try reboot several times but still get the same message, 

then, he check the bios for the disc health, seems fine, and after that,

he put the win2k8r2 disc and boot into the window installer screen,

attached with hard disk in bios and windows installer disk selection screen,

he personally suspect the boot sequence wrong, but after reboot, the windows back to normal.

he is worry that the similar issue will keep on repeat after second reboot or windows updates, 

he would like to seek advise for this.

Thanks

Operating System not found

Windows Server 2008 and Windows Server 2008 R2, based on the Microsoft Vista codebase, is the last 32-bit server operating system released by Microsoft. It has a number of versions, including including Foundation, Standard, Enterprise, Datacenter, Web, HPC Server, Itanium and Storage; new features included server core installation and Hyper-V.