Hi I think you need a good anti virus like Mcafee, there are lots of trials on the internet.
I not sure that hijackthis is worth the trouble, considering the amount of threads on the subject. I tried it but I wasn't keen on it (didn't understand it really)
If you are using windows there are lots of free ware to clean up your computer eg clean disk which has a facility to clean lots of junk a computer generates of time. (dont forget to tick all the boxes) then defrag and scan disc.
Clean-up then sort out!!!
Thank you for wanting to help, but we require all advice on malware removal come from either PCHF Security Staff, or certified users authorized by the Security Team Leader. Please refrain from posting on these matters in the forum. Thank you, Terdogtanner 