Windows Wont boot up: startup repair cannot fix the problem: error 0x490 - no OS files found

One day, i started up my Dell Optiplex 960 SFF (small form factor) with Windows 7 Ultimate 64-bit. As the windows symbol began to appear, i forgot i was going to enable a fan overide in the BIOS. so i forced shut down by holding the power button (I have done it more than 20 times with no adverse effects). As it booted up, i hit the F12 key which brings up Boot options and i went to system setup. All info/error logs below.

after allowing fan overide, i hit "EXIT" which rebooted my desktop. 
It went to the menu with "Launch Startup Repair" and "Start Windows Normally"
Because i have force shut it down plenty of times before, it hit enter to "Start Windows Normally"
However, as the words "Starting Windows" appeared, the normal four colors spinning to form the windows logo did not appear. I left it alone for about half an hour to grab lunch. Still nothing. So I force closed again (holding power button) and this time stared into "Startup Repair." However, it stayed the same at "searching for problems" for a whole day (+7 hours). i unplugged power over night and tried booting up the next day. Same result.

My next attempt at fixing it was unplugging the hard drive from the desktop and putting it back in and hope for a better result. I did just that. This time, when it booted up, it didnt even give me an option to start normally. It went straight to start up repair. This time, it actually said "attempting repairs", but it eventually said (after about a minute or so) that repairs were not able to be made automatically.  I typed out the results and logs and pasted them below. The only software i recently installed was some emulator for all versions of Linux and Mac OSX (hardware had to match a mac's in order to run OSX). i also installed FrostWire to sync my music between my desktop and Android. Besides that, i had no other devices or software installed to screw up my desktop. 
Results of Startup Repair:

Problem Signature
Problem event name: StartupRepairOffline
Problem Signature 01: 6.1.7600.16385
Problem Signature 02: 6.1.7600.16385
Problem Signature 03: unknown
Problem Signature 04: -1
Problem Signature 05: AutoFailover
Problem Signature 06: 1
Problem Signature 07: NoOsInstalled
OS Version: 6.1.7600.
Locale ID: 1033

Startup Repair diagnosis and repair log
Number of repair attempts: 1

Session details
System Disk = \Device\Harddisk0
Windows directory = C:\Windows
AutoChk Run = 0
Number of root causes = 1

Test Performed:
Name: System disk test
Result: Completed successfully. Error code = 0x0
Time taken = 0 ms

Test Performed:
Name: Disk metadata test
Result: Completed successfully. Error code = 0x0
Time taken = 46 ms

Test Performed:
Name: Target OS test
Result: COmpleted successfully. Error code = 0x0
Time taken = 188 ms

Test Performed:
Name: Volume content check
Result: Completed Successfully. Error code = 0x0
Time taken = 358 ms

Root cause found:
No OS files on disk

Repair action: Partition table repair
Result: Failed. Error code = 0x490
Time taken = 1216 ms

Wait, no OS files found on disk? WHAT? 
i have many documents for school and Norton 360 v5.0 ($60!)
besides that, there is really nothing else worth saving on the hard drive. Any solutions? i would rather not have to plug it in internally to another desktop and drag/drop files. 

Need help. I have been using my HP G60 laptop as a substitute and it isn't the same as using my desktop D:

Mister Kevin


Have you tried booting up with WIndows DVD? Insert Windows DVD but don't press any key when asked. It helped me boot up the system. From there you can try fix it from cmd prompt (unfortunately I forgot what exactly I did back then but I'll search and post it back here). As for backup there's no need to worry. Use a Knoppix CD/USB memory stick and copy everything on some other drive. N360 syncs subscription with Norton account. In case you don't have one you can create one and insert the CD Key and that's it.

Trust no one, Question everything!

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Question Info

Last updated December 6, 2019 Views 2,151 Applies to: