Could you please be a little more specific as to where this is happening? Everywhere is just a little broad.
Cyclic redundancy checks usually occur when the is a problem with CDs or DVDs, other causes are system crashes, if those occur you can try doing a System Restore to a date preceding this problem. If it is the media, try using it in another computer, if it fails there as well... there you go.
There's a decent article that you can read at the following link.http://www.softwarepatch.com/tips/cyclic-redundancy.html
Hope this helps
Edited by dc3, 08 August 2010 - 04:25 PM.