How to fix screwed MBR ...

admorris

New member
Alright guys, I completely screwed up my MBR (master boot record). Long story short I deleted it and cannot even install Win7 now...it says something to the effect of "cannot find a system partition" when I choose my drive to install. I have formatted the partition, so I no longer have an operating system to "repair". Any ideas on what I can do? I have a feeling my harddrive is basically junk at this point (brand freakin' new too). Any programs or tricks that ya'll know of?

Much appreciated in advance.
 

My Computer

OS
Windows 7
Is there any valuable information in the old install ?

If not just boot windows 7 disc and tell it to format the disc and install , if it's more complex than this please explain your setup ?
 

My Computer

Computer Manufacturer/Model Number
built my own
OS
win7 ultimate / virtual box
CPU
Intel Core i7 3770K,1155, Ivy Bridge
Motherboard
MSI Z77A-G43
Memory
GSkill Ripjaws Z Series 1600 CL 9.0 16GB
Graphics Card(s)
KFA2 GeForce GTX 670 EX OC 2048MB GDDR5 PCI-E gfx card
Sound Card
onboard Nvidia HDMI audio
Monitor(s) Displays
ASUS VK222H 22" widescreen LCD monitor
Screen Resolution
1680x1050
Hard Drives
Kingston 128gb SSD
OCZ Vertex 90gb SSD
500GB WDCaviar 16mb 5000KS
320GB WDCaviar 16mb 3200AAKS sata 2
1TB Samsung 16mb HD103SJ sata 2
PSU
Corsair HX 750W ATX2.2 Modular
Cooling
Antec 25 Kuhler H2O 620
Keyboard
logitech
Mouse
logitech MX518
Internet Speed
7mb adsl
Is there any valuable information in the old install ?

If not just boot windows 7 disc and tell it to format the disc and install , if it's more complex than this please explain your setup ?

All data backed up on external drive, so that is no problem. I have already gone the format route with no luck...still says I cannot install install b/c it's missing "system file" or "system partition"...something like that. Question...do I have to restart after I have formatted using the disk, or should I be able to immediately go to install without restarting? Also, my larger 650 gig harddrive doesn't even show up under the windows installation. It showed up within windows when I was using my computer and it currently shows up in the bios. I also tried to install Vista and it DID show up under that installation, but would not install due to the above error msgs. I'm about ready to chunk both drives and go get 2 new ones...but I feel like there is still something simple I'm missing. I would hate to throw away 2 new drives (650 gig wd black and 320 gig wd blue), but I'm almost at that point. Keep the ideas coming. I'm at a complete loss.
 

My Computer

OS
Windows 7
are you trying to install setup within windows ?

I am not sure we are "on the same page" so plz keep the answers simple and accurate :)

my idea was the simplest method would to boot into the DVD and ask windows to setup from there and go through a fresh install wiping anything already on the hard drive :geek:

let us know how that goes :)
 

My Computer

Computer Manufacturer/Model Number
built my own
OS
win7 ultimate / virtual box
CPU
Intel Core i7 3770K,1155, Ivy Bridge
Motherboard
MSI Z77A-G43
Memory
GSkill Ripjaws Z Series 1600 CL 9.0 16GB
Graphics Card(s)
KFA2 GeForce GTX 670 EX OC 2048MB GDDR5 PCI-E gfx card
Sound Card
onboard Nvidia HDMI audio
Monitor(s) Displays
ASUS VK222H 22" widescreen LCD monitor
Screen Resolution
1680x1050
Hard Drives
Kingston 128gb SSD
OCZ Vertex 90gb SSD
500GB WDCaviar 16mb 5000KS
320GB WDCaviar 16mb 3200AAKS sata 2
1TB Samsung 16mb HD103SJ sata 2
PSU
Corsair HX 750W ATX2.2 Modular
Cooling
Antec 25 Kuhler H2O 620
Keyboard
logitech
Mouse
logitech MX518
Internet Speed
7mb adsl

My Computer

Computer Manufacturer/Model Number
Samsung NP530U4B-S02IN
OS
Windows® 8 Pro (64-bit)
CPU
Intel® Core™ i5 Processor 2467M (1.60GHz, 3MB L3 Cache)
Motherboard
Samsung Electronics
Memory
6GB DDR3 System Memory at 1,333MHz (on BD 4GB + 2GB x 1)
Graphics Card(s)
AMD Radeon™ HD7550M 1GB DDR3 (Ext. Graphic)
Sound Card
Realtek High Definition Audio
Monitor(s) Displays
35.56cm (14.0) SuperBright 300nit HD LED Display
Screen Resolution
1366x768
Hard Drives
1TB S-ATA II Hard Drive (5400RPM) with ExpressCache 16GB SSD
Internet Speed
sucks
Antivirus
Microsoft Security Essentials
Browser
Google Chrome (Sync enabled)
If the MBR is messed up, when you boot from the W7 disk and do the install it will rewrite the MBR. As it does this, there will be scrolling message on the screen that says something like "writing to index......". This may take 5-10 minutes so don't think it is not going to work. Juse wait it out.
 

My Computer

Computer Manufacturer/Model Number
Homemade
OS
Windows 7 Ultimate
CPU
E8500
Motherboard
Asus P5E3 Premium
Memory
4 GB
Graphics Card(s)
Nvidia 9800 GTX+
Sound Card
SB X-Fi
Monitor(s) Displays
Samsung T260
Hard Drives
WD3000GLFS
WD5000AAKS
WD5000AAKS
HDS72252
PSU
?
Case
?
Cooling
?
Welcome to Seven Forums.

It's not really clear what you have done so far.

Read through this Seven Forums tutorial:
(Click here=>) Clean Installation with Windows 7

In step #7 click on 'Drive Options (advanced)' you should see the HD in this step.
Continue as per the tutorial. Make the partitions as you would like them and format.

If you can't see the HD in step 7 above, tell us what you see there.
Give us a step by step of what you have done to that point.

With details we can help get this issue solved.
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
76~2.0
OS
Windows 7 Ult x64 - SP1/ Windows 8 Pro x64
CPU
Intel Core i5-3570K 4.6GHz
Motherboard
Gigabyte GA-Z77X UD3H, f18
Memory
8GB (2X4GB) DDR3 1600 Corsair Vengeance CL8 1.5v
Graphics Card(s)
Sapphire HD 7770 Vapor-X OC 1GB DDR5
Sound Card
Onboard VIA VT2021
Monitor(s) Displays
22" LCD Dell
Screen Resolution
1680x1050
Hard Drives
Samsung 840Pro 128GB SSD,
Seagate Barracuda 500GB SATA2 7200rpm 32MB cache, Seagate Barracuda 1TB SATA2 7200rpm 32MB cache,
PSU
Corsair HX650W
Case
Cooler Master Storm Scout
Cooling
Corsair H80 2x12cm Noctua NF P12 , 2x14cm case fans
Keyboard
Logitech Wave
Mouse
CM Sentinel
Internet Speed
Dismal
Antivirus
Avast
Browser
Opera Next
Other Info
Haswell laptop: HP Envy 17t-j, i7-4700MQ, GeForce 740M 2GB DDR3, 17.3" Full HD 1920x1080, 16GB RAM, Samsung 840 Pro 128GB, 1TB Hitachi 7200 HDD,
Desktop: eSATA ports,
External eSATA Seagate 500GB SATA2 7200rpm,
External WD USB 500GB
Why would you toss perfectly good HDD"s because the rewritable MBR is borked?

In the future, you can fix that by booting into the Win 7 installer Repair console and running Startup Repair 3 times.

If you have a question about the HDD's integrity, download GWScan bootable and run a full diagnosis/repair of the HDD. It is WD's Data Lifeguard but works on most makes.

But the MBR is written at install, or rewritten using Startup repair.
 
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