Malware or system errors?

I cannot seem to figure out what is the problem, first off, my mozilla firefox
will not allow any search sites (yahoo,google,ask,metasearch) it will load the first page but after it will not permit me to search anything.

My internet explorer just seems to launch it's self over and over again, happens about 40% of the time im browsing.

Last my computer seems to run really slow now, not sure what program or whatever caused it.
For countermeasures I used McAfee's Virus scans and firewalls/ Registry Mechanic/ CCleaner/ Ad-Aware and the virus scanner and spyware scanner found nothing, they are upto date as well. CCleaner and Mechanic didn't help either....? Any ideas on what may be the problem, any help :cry would be extremely useful.

 

Hi hav0kspartan,
Welcome to Major Geeks!

It sounds like you have a problem with malware. In order to help you the most efficiently and quickly, we need for you to go through our precedures in the order which we request in the READ & RUN ME FIRST. If you are having trouble with your browsers, you will need to download the installation programs onto an external medium like a cd or flash drive and transfer them to the infected computer. When you finish, please use the Manage Attachments button down a little ways under the reply box for your next post to attach the logs.

abri