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bilko123 · 07-02-2010, 12:20

Hi guys, this thread has seen quite a few forums in the last two weeks as I attempt to diagnose a problem that's been plaguing me. I've been a Virgin Media customer for over 8 years (Since they were called NTL) and had no issues but all of a sudden last week all my downloaded files, Rar files and Executables so far both reporting corruption at a rate of around 70%.

For example I use a program called JDownloader to download things from Rapidshare, the program will report 'Connection Lost' and then occasionally 'CRC Error MD5'.

So at first I of course assumed this was an issue with the program, I reinstalled and updated etc, still there. Then I tried downloading some of the corrupt files straight through Firefox to take JDownloader out of the equation.

I still got corrupt files however and the problem was also now affecting Exe files, perfectly legit files that should have worked.

So at this point I turned to the hardware, maybe dodgy RAM or bad sectors on the HDD, I'd looked around on lots of forums and seen this suggested many times. I ran HDD checks and overnight RAM checks, all came back OK. So I used a laptop connected to the network to download the same links from. They all came back ok, but the second time I did it they too had corruption of ~50% of the files.

So it can't be the hardware. I format my computer, reinstalling Windows 7 on to a different harddrive.

Still nothing.

So it must be the network right? The router or the cable from the modem? That's what I thought, I replaced the router with a network switch just to see if that changed anything, the problem remained. So last ditch attempt. I plugged the modem directly in to the PC using a brand new cable (no small feat with it being around 20m long).

Still getting corruption errors.

It really can't be anything on my end, can it? A phone call to Virgin Media was very unhelpful with the usual 'turn it off and on again attitude' and the speed tests (Annoying as I never mentioned speed). I was told to turn off the firewall on my router, even though I told him I had replicated the problem without the router even being connected. Seems I have absolutely no hope of solving this from VM 'tech support.'They told me the line had only disconnected once in the last month and it was a stable connection. Could it be the modem then?

So here I am, a broken man. Does anyone out there have any idea what I can do to fix this?

Specs:
HDD 1 - Samsung SpinPoint F1 HD103UJ 1TB Hard Drive SATAII
HDD 2 - Western Digital WD5000AAKS 500GB SATAII
RAM - Corsair 4GB (4x1GB) DDR2 800MHz/PC2-6400 XMS2
GFX - Powercolor ATI Radeon HD5850 1024MB GDDR5
MOBO - Asus COMMANDO P965 Socket 775
CPU - Intel Core 2 Quad Q6600 B3 (2.4GHz 1066MHz) Socket 775 L2 @ 3.0ghz
PSU - Seasonic M12 700W Modular PSU
OS - Windows 7 Premium Home 64bit

Update:

The problem seems to start with connection freezing. The download speed and estimated time parts just stop (At this time all the lights on the modem also freeze) then it reports this 'Connection lost' thing. Seems to happen every few minutes.

07-02-2010, 12:20	#1
bilko123 Inactive Join Date: Feb 2010 Posts: 18	Download corruption and CRC errors. Hi guys, this thread has seen quite a few forums in the last two weeks as I attempt to diagnose a problem that's been plaguing me. I've been a Virgin Media customer for over 8 years (Since they were called NTL) and had no issues but all of a sudden last week all my downloaded files, Rar files and Executables so far both reporting corruption at a rate of around 70%. For example I use a program called JDownloader to download things from Rapidshare, the program will report 'Connection Lost' and then occasionally 'CRC Error MD5'. So at first I of course assumed this was an issue with the program, I reinstalled and updated etc, still there. Then I tried downloading some of the corrupt files straight through Firefox to take JDownloader out of the equation. I still got corrupt files however and the problem was also now affecting Exe files, perfectly legit files that should have worked. So at this point I turned to the hardware, maybe dodgy RAM or bad sectors on the HDD, I'd looked around on lots of forums and seen this suggested many times. I ran HDD checks and overnight RAM checks, all came back OK. So I used a laptop connected to the network to download the same links from. They all came back ok, but the second time I did it they too had corruption of ~50% of the files. So it can't be the hardware. I format my computer, reinstalling Windows 7 on to a different harddrive. Still nothing. So it must be the network right? The router or the cable from the modem? That's what I thought, I replaced the router with a network switch just to see if that changed anything, the problem remained. So last ditch attempt. I plugged the modem directly in to the PC using a brand new cable (no small feat with it being around 20m long). Still getting corruption errors. It really can't be anything on my end, can it? A phone call to Virgin Media was very unhelpful with the usual 'turn it off and on again attitude' and the speed tests (Annoying as I never mentioned speed). I was told to turn off the firewall on my router, even though I told him I had replicated the problem without the router even being connected. Seems I have absolutely no hope of solving this from VM 'tech support.'They told me the line had only disconnected once in the last month and it was a stable connection. Could it be the modem then? So here I am, a broken man. Does anyone out there have any idea what I can do to fix this? Specs: HDD 1 - Samsung SpinPoint F1 HD103UJ 1TB Hard Drive SATAII HDD 2 - Western Digital WD5000AAKS 500GB SATAII RAM - Corsair 4GB (4x1GB) DDR2 800MHz/PC2-6400 XMS2 GFX - Powercolor ATI Radeon HD5850 1024MB GDDR5 MOBO - Asus COMMANDO P965 Socket 775 CPU - Intel Core 2 Quad Q6600 B3 (2.4GHz 1066MHz) Socket 775 L2 @ 3.0ghz PSU - Seasonic M12 700W Modular PSU OS - Windows 7 Premium Home 64bit Update: The problem seems to start with connection freezing. The download speed and estimated time parts just stop (At this time all the lights on the modem also freeze) then it reports this 'Connection lost' thing. Seems to happen every few minutes.