Recent Malware infestation

My computer has numerous problems since this morning. Unfortunately i do not know what happened when my PC got infected, my nephew was on it and now it is infected. Only thing file wise, were shockwave slim installers on desktop that were not previously there..

First signs were fake Antispyware poping up saying I was infected and referred me CoreGuard Antivirus 2009. It tried to download and install but I Crt+Alt+Deleted before it could finish. Ran Mcafee Security center a few times and that seems to have gone away for the time being. I also have cases of Msiexec files runnning all over in my TaskManager processes. So I deleted all traces of Msiexec files(hopefully that wasnt a mistake =S) and now there not there anymore. It's having problems opening up and running certain programs, such as Spy Bot Search & Destroy, Ad-ware remover 2009, Spysweeper, Spywaredoctor, etc. So i could not do all the scans in the malware forum rules. SuperAntispyware keeps encountering a problem and needs to close as soon as i click it. Malwarebytes Anti-Mulware stops prematurely in between installation. Double clicked on combofix and nothing happened. Also when I click on new links in search engines it redirects me to otherwebsites, in both firefox and Internet Explore. System restore doesn't do anything when i click on a restore date then click, "Next". Usually I am able to fix the problem myself but all my tactics have been exhausted. This is the first time I ever needed help, and i could really use some =). Thanks guys for your time, and I hope to here from you soon,

-Mike Canales