Solved Computer states Checkum bad error

Toshiba / Satellite l305
October 23, 2011 at 05:47:39
Specs: Windows 7, 2.194 GHz / 3964 MB
my dad has an old custom build that got a virus. He dropped it off to me so i could transfer the data and wipe his old system. I took his hard drive out since i didnt have a vga cable to display his OS. So what i did was took that out and connected it to my computer and transferred the files to my external hard drive. I took out his os and installed windows 7 using my computer. I downloaded all windows updates which took forever and had issues with permissions from transferring the data but thats been done already. I put the hard drive back into his case and connected it to the motherboard. I turn on his machine and during the post startup a message says "Checksum Bad Error" Then it gives me options to go into setup or load defaults. It also states that my overclock failed. But i never overclock and never had my dads computer overclocked.

I tried to resolve this by taking out the cmos battery and pressing the power button to clear the stats. Removed the jumper cables and put them back in. Same issue. I get the same message and then the computer powers off. Sometimes i get to the windows loading screen and then it shuts off! Any suggestions?

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October 23, 2011 at 06:40:25
✔ Best Answer
You can't install windows 7 from your computer and transfer the hard drive to his. Win 7 checks the hardware configuration during setup and records it. When you boot up your Dad's machine, the settings don't match, hence the bad checksum error, Unless you have a copy of Win 7 with multiple licenses, you can't install it on his. You'll need to buy a copy for him, or reinstall his XP. or whatever he was running.

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October 23, 2011 at 08:52:48
Did this by chance say CMOS Checksum Bad Error? You need to go into the BIOS and reset the BIOS settings and save them. This will then recalculate a new checksum. Just resetting the jumpers and removing the battery will not recalculate a new checksum

Nevertheless, what Grasshopper says about install in Windows 7 on one computer and running it on another still applies. .

You seem to have a combination of errors and the Checksum Error and OS error are just two of them. Get the Checksum Error sorted first then get the OS sorted by reinstalling it on the computer is going to run on. There may be others once you install the OS the correct way.


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October 24, 2011 at 06:56:41
That makes sense. Thank you for the answer. I stopped getting that error message when i formatted his drive and stuck it into his computer. but get this. Even if i try to boot from an external device the machine just keeps shutting down on me. I just tried to install win 7 from my external seagate drive and the machine just shut off. No messages, no beeps. Just shut off. any ideas? If i sit in the bios for a longer than a minute. it shuts off.

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January 9, 2012 at 19:03:03
Nevermind. I found the answer. Turns out the heatsink was bad as well. That explained why the machine was all of a sudden turning off. I looked at the temp. Processor was hitting an excess of 200 degrees F. Crazy stuff.

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