What is Cyclic Redundancy Check and can I still download?

i been having a problem....... I just restore my PC ....... im using Windows XP i been having problems....it was running very slow and when i tried to install programs they did not work..... i run a Volume check and now its normal and programs are running...

alright. there is this game called americas army. and when i download it from the web. i cant install it! it always says "Data error: cyclic redundancy check" wth is this!!?? so i redownloaded from a different website, and i still get the same...

I decided to download the Sims 3 on my laptop computer, but it looks like I've hit a wall. A data error has decided to appear within a certain one of the files... and it's hindering my data progression. It says in parentheses that I should use cyclic...

I have a folder in my external HD that i would like to delete. However, I am not able to, whenever i try it's giving me this feedback: "Cannot delete file: data error (cyclic redundancy check)". What is this? Please help me delete these file...

I got DVD Shrink & DVD Decrypt-er so I can copy my movies and sell them because I desperately need the cash. But I keep getting "I/O Device Error" and "cyclic redundancy check"! Is there a way to by pass this so I can successfully...

How do I install my game, the "Cyclic Redundancy Check" stops the installation in both the games Oregon trail (5th edition) and the Sims. What do I do?

Out of no where, I'm not longer able to open any files from my external hard drive. It shows up as a drive, and I see my folders, but when I try to open any of them, I get a message telling me I have to format the drive before I can use it. It then gives...

i'm burning a DVD and it got part of the way through reading it, then it stopped and said "Failed to read file 'E:\'" and underneath that it said "Data error (cyclic redundancy check). What does it mean and how do i fix it