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W8 Release Preview SHA-1?


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#1
johnhc

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I DLed the W8 Release Preview (x64 English) yesterday and the SHA-1 did not agree with the one posted on the MS DL site. I re-DLed it today and got the same SHA-1 as yesterday. I got 620133124AF276E4300012148AC81E62557D73A9 for the SHA-1. Can anyone confirm this? Thanks and enjoy, John.

Edited by johnhc, 16 August 2012 - 01:33 PM.



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#2
MagicAndre1981

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English

64-bit (x64) Sha 1 hash 0xD76AD96773615E8C504F63564AF749469CFCCD57

32-bit (x86) Sha 1 hash 0x8BED436F0959E7120A44BF7C29FF0AA962BDEFC9


source:
http://windows.micro...S/windows-8/iso

So your file is corrupt.

#3
xpclient

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64-bit Release Preview ISO SHA-1 hash is: D76AD96773615E8C504F63564AF749469CFCCD57 as that site says. RTM x64's E63C1D3733532ABC7AB28F3D61526E361E80271A

#4
johnhc

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Thanks to both. Have either of you DLed it lately? I am using IE9 on W7 x64 with no DL manager and HashTab 4.0.0. File name is Windows8-ReleasePreview-64bit-English.iso. Hard to believe I got two identical bad DLs.
More hash codes:
CRC32: 4ECB1F5A
MD5: 7C304307B56C4670E0877092D4C82EC7
SHA-1: 620133124AF276E4300012148AC81E62557D73A9
Thanks and enjoy, John.

#5
MagicAndre1981

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no, why? I've already downloaded the file. Always use a download manger for such huge ISOs. This is safe.

#6
johnhc

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MagicAndre1981, thanks. A friend DLed it and got the correct SHA-1. I DLed it again using IE9 and got a bad and different SHA-1. I DLed it using Chrome and got a bad and another SHA-1. Something is amiss here. I usually do not use a DL manager, but if you have a free one to recommend, I'll give it a try. Thanks and enjoy, John.

#7
CharlotteTheHarlot

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If you are running realtime antivirus, try downloading it again with it disabled.

For example if you are using MSE (Microsoft Security Essentials) that little green icon should be red indicating that it is not scanning downloads and other files.

Such realtime programs can affect downloads and even inserting a flashdrive.

#8
Joseph_sw

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though for large files i would recommend using torrents than download manager,
as torrent has its own hash check for each 'part' preventing wrong data/files being build.

but MS probably doesn't like torrents....

#9
johnhc

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Thanks guys. I do not think it is my AV and I am not Torrent inclined. I tried several times more with different bad SHA-1 codes. I Googled "bad hash W8 release preview" and found lots of people with the same problem and I also found a direct link (here) that worked. I realy believe this is an MS problem - even W8 Comsumer Preview had the same problem. I have DLed FDM (Free Download Manager) and will try it later. Thanks for all the comments. Enjoy, John.

#10
MagicAndre1981

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I always use "Free Download Manager" :) Great tool :thumbup

#11
johnhc

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Thanks, MagicAndre1981. Interesting results with FDM. It works great, running at my full DL speed but I also have hash problems. When I click the Download button on the MS page (here), I get a bad hash code. When I drag the Download button into the FDM icon, I get a good hash code. The difference is the URL used. When I click on the Download button, FDM DLs from http://iso.esd.micro...bit-English.iso, but when I drag the button to the FDM icon, it DLs from http://go.microsoft..../?LinkId=251532, the direct link I showed above. Again the direct link works (good hash code) and the button link does not (bad hash code). In the FDM log I see this:
6:36:19 PM 8/13/2012 Checking if download is malicious (see options to disable this)

6:36:21 PM 8/13/2012 OK, FDM's users did not report that this download is malicious

6:36:21 PM 8/13/2012 Starting download...

6:36:21 PM 8/13/2012 Redirecting...

6:36:21 PM 8/13/2012 Redirection succeeded. Opening new URL

.

.

.

I tried running FDM on my VM (VMware Player running W7 x64) and it barely worked at all (indicating 4-8 hours DL for a 15 minute file). Thanks and enjoy, John

#12
MagicAndre1981

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Most of the time I drag the links so I never had any issues.

#13
johnhc

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I tried running FDM on my VM (VMware Player running W7 x64) and it barely worked at all (indicating 4-8 hours DL for a 15 minute file).

I did not wait for the file initialization to complete. Once completed, the DL went just fine under a VM (100% Maximum DL speed). Enjoy, John.

#14
MagicAndre1981

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ok :)

#15
johnhc

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The problem remains UNRESOLVED. I have DLed the file many times using FDM and it has the wrong SHA-1 most of the time. I am tired of DLing and I am sure the MS server is also, so I give up now that I have a valid copy. Any thoughts would be much appreciated. Thanks and enjoy, John.

#16
MagicAndre1981

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which Antivirus software do you use?

#17
johnhc

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MagicAndre1981, I use Comodo on my HW but none on my VM. I have bad DLs on both. As near as I can tell, the failures are just random. Thanks and enjoy, John.


EDIT: I have no evidence of bad DLs on any other file(s).

Edited by johnhc, 16 August 2012 - 05:27 PM.


#18
CharlotteTheHarlot

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The problem remains UNRESOLVED. I have DLed the file many times using FDM and it has the wrong SHA-1 most of the time. I am tired of DLing and I am sure the MS server is also, so I give up now that I have a valid copy. Any thoughts would be much appreciated. Thanks and enjoy, John.


Sorry if I missed it upthread, but are you downloading from a web browser? There is / was a problem in Opera resulting in random bad downloads.

If you are using Opera I will elaborate.

#19
johnhc

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CharlotteTheHarlot, thanks. You missed some of it. I am not using Opera. I have seen failures in IE9, Chrome and Free Download Manager (FDM). I have not kept a record, but I think I have about 10 DLs all total with one success in IE9 and one in FDM. Both of my successes were using the direct link shown above. Thanks and enjoy, John.

#20
MagicAndre1981

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which network card do you use?

#21
johnhc

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which network card do you use?

I have an ASRock MB and it contains a Broadcom NIC (in fact, two) - Broadcom NetLink ™ Gigabit Ethernet. Drivers are most recent released by ASRock. Thanks and enjoy, John.

#22
xpclient

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@OP, I used NetXFer (NetTransport) btw and max. download connections=1 setting.



#23
johnhc

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@OP, I used NetXFer (NetTransport) btw and max. download connections=1 setting.

Thanks, xpclient. I DLed NetTransport ,installed (on a VM), took all defaults and DLed the W8 RP. SHA-1 was correct - first try! The "Max concurrent tasks" was set to 10, but I saw only two connections (TCPView). The DL speed was somewhat less than my ISP speed (25 minutes vs 15 for FDM). I then went over to HW and DLed the file using FDM (20 sections-like threads, I think) and got a correct SHA-1 also. I need to do some more testing, but I am beginning to think it is a server load problem. These two tests were done on Saturday (8-18-2012) between 6:02 AM and 6:59 AM CST USA. In NetTransport I don't see a way to disable Torrents and $30 is a lot for this application, although it looks more sophisticated. Thanks and enjoy, John.

EDIT: Just did two more DLs, both with good SHA-1 codes, about 10:30 AM Saturday. On VM NetTransport with 10 threads (ran almost at ISP speed) and FDM on HW. I will try again on Monday.

EDIT: Two more DLs on Monday went fine. Whatever the problem was it is no more.

Edited by johnhc, 20 August 2012 - 02:31 PM.





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