dude my CCleaner shows a startup program named "44b223e8" and the file is rundll32.exe "C:\WINDOWS\system32\nuedncrp.dll",b . whenever i start windows i get a security error msg. is this coz of dis startup program? should i disable this startup?

Ummm... sounds to be some malware.
You can find some people more experienced than me in the Spyware Hell section of this forum

A google search for 'nuedncrp.dll' does't find nothing but your message.
However, first of all try to disable it from startup, and reboot. Let's see if it re-enables by itself.