CRC Mismatch Errors

  sorceror7374 12:05 PM 06 Aug 11
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I'm running XP (SP3) 32 bit fully updated on AMD Phenom QuadCore system with 4GB RAM. The Mobo bundle is only a few months old and my drives are 2.5 years old. After installing the new Mobo bundle and reinstalling a fresh copy of XP I found that my downloads (RAR files) were giving me CRC mismatch errors but the resulting file was still usable ie. videos played fine, no data was missing from text files and such. On running checksums I was receiving the same errors as well. None of this was occurring before the change of Mobo bundle, but I've tested the RAM and received no errors and ran chkdsk on most partitions including the boot partition and it came up with no bad sectors. Another thing of note is that my ISP router kept dropping the signal once I made the switch, but it has been fine ever since as I reinstalled the firmware on it. I've tried re-downloading the bad RAR pieces and ran more checksums and then other pieces would show errors that didn't the first time around.

Any ideas what could be causing these errors?

  gengiscant 14:13 PM 06 Aug 11

CRC is also known as a checksum. The archive has an expected checksum value stored in the file and the RAR decompresser calculates the value from the complete file. If the two values are not identical you get the above error. What that means is that something went wrong during the transfer and at least one of your rar files is defective and needs to be downloaded again.

I would look again at your router.Installing the Windows Installer update may also help. The Windows Installer update can be downloaded from Microsoft's Website Micro inst You might also want to check that NetBIOS has access to the internet.

  sorceror7374 15:20 PM 06 Aug 11

As my XP is SP3, Windows installer is already up to date according to the download page. I have no idea how the check the status of NetBIOS.

  gengiscant 18:03 PM 06 Aug 11

Go to Start->Control Panel->Network Connections.

Right-click on Local Area Connection and select Properties.

Highlight "Internet Protocol (TCP/IP)" and click the Properties button.

Next, click the Advanced button, then choose the WINS tab within the next window that appears.

Now, in the "NetBIOS setting" section select the "Enable NetBIOS over TCP/IP" option.

To finish, click OK three times to close all windows. You may have to reboot for the change to take effect

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