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My Surface Pro 3 died last October which had my bitcoin wallet on it. I forgot that I had any. I had bought them a (long) time ago for about 10 euro if I remember it correctly. But since the hardware crash of my sp3, the rate went up. Way up….

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I decided to look into my backup and try to restore my wallet to see how much I had and how much it’s worth today. I had multibit classic in the beginning and upgraded to multibit HD 0.5.x back then. During the move from classic to HD I forgot my wallet words and only had my password and the backup AES wallet files.

I started my first recovery attempt on may 30th, but failed because I had no wallet words.

My second try was last week as I found this GitHub repo with a python script which can extract words from a backup file if you have the password. Sort of brute force “attack”. https://github.com/gurnec/decrypt_bitcoinj_seed

So I installed python 2.7.x alongside with 3.6 which I already had. and ran the PowerShell script.

I had a Windows 7 style backup by the way of my Win10 device and had to navigate to “C:\Users\myUsername\AppData\Roaming\MultiBitHD” and restored the full content of that folder to a new folder on my desktop. Please do not forget to check the box to have the original folders restored. Otherwise it will replace files with the same name and path references will be broken.

But somewhere in the mutlibithd is the rolling backup which you can restore once you have your password and wallet words…. so I thought.

But the amount stayed unconfirmed. So it’s useless. I have seen a lot of people with this exact same issue. Some moved away from multibitHD just because of this. The solution was not that obvious. It also did not work for everyone.

I had to downgrade to MultiBit HD 0.1.1 https://multibit.org/releases/multibit-hd/multibit-hd-0.1.1/

and renamed “C:\Users\myUsername\AppData\Roaming\MultiBitHD” to “C:\Users\myUsername\AppData\Roaming\MultiBitHD-old” and re-restored the wallet with the password, wallet words and backup file.

snip_20170809162115

It is weird to have the old 0.1 version, but I am glad that it is confirmed again and in my wallet. Now I can step away to alternative wallets.


Good luck!

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I had this error “A reference to a higher version or incompatible assembly cannot be added to the project” during my Windows Phone development. I wanted to add some dll’s because there are no nuget packages for smaato, mobfox etc.

http://i.imgur.com/YsNnEWF.png

At first I thought that it was because the dll’s were not build as portable class library. But then I found this other source online which gave me the correct and simple answer: Windows blocks the downloaded dll’s by default. You have to unblock it by going to the properties of the dll.

You can also unblock with powershell by using Unblock-File

So perhaps the dialog of visual studio should tell me that it is impossible to add a reference to a blocked dll.

Good luck!

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imageMy external hard drive is unavailable in Windows when I tried to open it in explorer (my computer) I was really annoyed by it, because it is my primary backup disk. I have found HD Tune free which is a great tool to scan your (external) drive for errors. The “quick scan” came out clean. The complete scan took a while but also was 100% green.

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But still no access to the drive. On a dutch computer magazine website I found this small (also free) util called EaseUS data recovery. It can recover 2gb for free, but it can always scan your full drive to see if it can be of any help and is worth the buy. That tool also found all files:

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But still no access to the drive. After some searching the interwebz I found an article which suggested to check the disk management of Windows if that would list the drive and if it would list the partitions.

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And there is the error! The external drive is in RAW filesystem!? I have never ever heard before of a raw filesystem. I expected NTFS (because it can handle *.iso of over 4gb)

So I have found this article How to fix external drive suddenly became raw. That article suggests that you use Parted Magic which is no longer a free download, but still is available on majorgeeks.

You can also download testdisk for windows so that you do not have to burn an linux iso and reboot your PC. http://www.cgsecurity.org/wiki/TestDisk_Step_By_Step

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There are a few guides online for the testdisk tool. I did not had to fix the mbr but I did write the partition table for the external harddrive. All that was left was just running checkdisk:

chkdsk F: /F
This solved it for me.

I will use the unplug usb drive build in windows feature everytime I use my external harddrive from now on.

Please read this if you do not know how to safely remove the usb drive in windows.

Good luck!

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