micali

My computer is getting this error that Windows has lost a file and that it may not run properly. I then get another box that pops up and states that Windows needs a particular file and that I need to enter my windows disk with service pack 2 so that it can repair itself. I don't have a disk, windows installed sp2 off the internet. But now I can't get on to the internet. I am using a router for my laptop. Everything was working fine about 2 hours before. What can I do to fix this

errror sig.

appname: explore.exe appVer 6.0 ModName: shlwapi.dll