Some bug is up all the time searching URLs on UC browser can anyone help me

I am not entirely sure what is exactly your problem, but assuming your browser is working on it's own, I'd tell you to either provide more information or (preferrably, and) use ADWCleaner, which helps in most cases with "browser malwaring".

I'd also tell you to try the oficial site, but I think last time I did, it came packed with some crappy installer. Should that be the case, try this old version of me [link to unofficial source removed]
 
What Operating System are you running?

Can you (as has been requested) provide more information.

Explain what is (or is not) happening.

E.g. what kind of URLs are being searched for?
 
Are you sure this is not your chosen antivirus/security solution (or internal business firewall) investigating the URL you are trying to access before allowing it's access to proceed?