You can use CWShredder - CoolWebSearch Trojan Remover v2.19 to find and remove CoolWebSearch (CWS) browser hijacker on your system.

From CWShredder - CoolWebSearch Trojan Remover v2.19, you can see the symtoms if you system  attacked by CoolWebSearch (CWS), such as: Redirections to CoolWebSearch related pages; Redirections when mistyping URLs; Redirections when visiting Google; Enormous IE slowdowns when typing; IE start page/search page changing on reboot; Sites in the IE Trusted Zone you didn’t add; Popups in Google and Yahoo when searching; Errors at startup;  Unable to access anti-spyware tools or sites.

You also can move the CoolWebSearch (CWS) that has found to Recycle Bin instead of deleting them.

You can download CWShredder - CoolWebSearch Trojan Remover v2.19 from http://download.cnet.com/CWShredder/3000-8022_4-10301587.html