CRC errors and corrupt downloads

Bilko123

Bilko123

Bilko123

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Joined
2 Dec 2009
Posts
27
Hi guys, been kicking myself the last few days trying to solve this very annoying problem. :(

Everything I download seems to have a 50%ish chance of being corrupt.

I first noticed it about a week ago while using a download program called JDownloader, seen here:

12214zq.jpg


I thought it was a bug with their program but after trying to download some of the links again through firefox and still getting corrupt ones I became worried. So I narrowed it down to being either Rapidshare or RAR files at fault. But yesterday I downloaded an EXE through firefox and got this message:

2q07d5s.jpg


So far I've tried a few things to sort this out:

- Full format and changing the drive Windows 7 was installed on (From the 1tb drive to the 500gb one). Both receive this error.
- Various RAM and HDD checks (Need to redo these but not sure what tools to use)
- Reconnecting physical HDD's inside case.
- Turning all firewalls and virus scanners off.

So I just need help diagnosing this and figuring out what needs replacing/fixing. Thanks guys. Specs below.

-----------------

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
 
bilko, is there another system you could use for the dload?

You dont want to dload it off a system that is already having dload problems.
 
Yeah I have a laptop (need to do more download tests on that but from the small test I did I didn't get a single error).

Anyway, I ran the test and it passed with no errors, was hoping it would be the RAM so I could just replace it. Doh.

2qd1r1t.jpg
 
I had a similar problem and I put it down to either a dodgy wireless signal or my ISP acting up. Files just wouldn't download correctly and I don't know why. Either way, after a while it stopped happening.

That's just my personal experience.
 
Just thought i'd try this, a month back I overclocked my CPU and also enabled a thing called Memory Remap which allowed my computer to see all 4gb of my RAM. Just gonna try a quick test with everything in my BIOS set to default.

How long did it take to rectify itself for you Sean?

EDIT: Nope this didn't work at all. Anyone got any other ideas? :(
 
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you might need to run more than 1 pass of memtest, sometimes it takes 7 or 8. Most people tend to say to run it for 12 hours (overnight) as a minimum to actually emliminate the ram as a possible cause.

When you formatted, did it also mean you had to re download firefox etc, or were they installed on a seperate drive? Also, you say "full format", did you just use win7's dvd to format the drive? as that is only a quick format which wipes the MFT and doesnt check for bad sectors or remap them. I'd get it to do a check disk at boot up. Run cmd > chkdsk c: /b
(it will say it cant, would you like to do at reboot etc. if it doesnt then do it from teh win cd)
that will check the entire disc, try to fix any dodgy data, recover it, map the bad sectors, and try to recover any sectors already marked as bad.

Are you having to reboot your router periodically/is your net disconnecting more than once a month or so?

Have you tried running Prim95 on all cores for 8 hours? (i tend to think more like an hour is fine tbh).

If you do the same download from the same address on your laptop, is it fine?

If all the above dont help, then i think its /cry time
 
Ah right, didn't know that, will run a full one tonight, thanks.

I did a full format, formatted both HDD's and used Externals to back up the data (no installed programs) I downloaded everything else like Firefox from scratch. I booted from the Windows 7 DVD and reinstalled using that. I realise that's not a full format but this thing is affecting both HDD's, could it really be that?

I've already ran check disk from boot using right click > properties > schedule boot scan. No errors.

My router has been fine, no disconnect issues that I can think of. I unfortunately cannot test it without my router as it doesn't work when I plug it directly in straight from my modem.

I did a laptop test which had no CRC errors but that was only with 5 or so files, I could have been lucky. I will try with a larger set of downloads now.

Haha, i've been doing plenty of crying already. Cheers mate.
 
Yeah I did try that when I thought JDownloader was the problem. But it's not, this happens on JD, IDM even Firefox. It's not a software issue I don't think.
 
Oh crap, just run a download on my laptop and I'm also getting CRC errors on there. So what do we think then? Network issue? New router time??

This is weird though because now they're ALL getting CRC errors on the laptop. WTF.

ddolna.jpg


Also, shortly after this picture was taken the next batch got 'CONNECTION LOST' errors and crapped out. Shiiiiiiiii.
 
On my old PC, this problem turned out to be the NForce 4 'firewall' built into the motherboard. Turning it off cured the problem. Not sure if this will work in your case, but worth a try.

Just read the bit about a router.. Try turning off any firewall built into the router...
 
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Have you tried an alternative network interface card, try a wired one or conversely a wireless one to see what happens.

Try running a few rounds of OCCT also.

edit: and yes if it happens both on desktop and laptop, your router is probably dodgy.
 
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@Anon-e-mouse This just started happening though, I hadn't touched or changed anything. I'll have a look though. Thanks.

@dustofnations Well the laptop has a different network card in it and it happened on that, the only possibilities left are router or connection.

@Ricardox1 Yeah that's what I thought. Will get a new router at some point soon, if that doesn't help then it'll be the connection.
 
If it's happening on two separate machines on the same connection it's basically got to be the router or internet connection.

Can you try the router on a friends line? (or a firends router on your line?)
Otherwise the only way to rule it out is to buy a new router.
 
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