Trojan ESQUL virus on my computer

I am having this problem on my laptop, operates on Windows Vista. I keep on redirecting to other websites I am not supposed to visit. Also a bunch of files are infected according to AVG. It found trojan on files like:
Windows\System32\ESQULnvrnxynnmtpdenpeswtcoeriipjdmgxt.dll
Windows\System32\ESQULserv.sys
Windows\System32\ESQULnfhtkjlyohlwewydsdfgoifltrt.dll
Windows\System32\ESQULservwjmgnctdufnfuglhoslsdfgfdfgd.dll

All files starting with ESQUL are all over my computer. Please help me. Thanks a lot.