maliciousous url blcked & microsoft Malicious Software messages but cant find

I need some help/advice please guys. I’m a novice and have tried to look for help but cant find anything that works. The background is when online web pages where openening without requesting them this seems to have stopped now but im still getting the malicous url blocked pop up, when online and offline, ive managed to pin the pop up to the screen ths time (it goes fast!)it says Infection: URL:Mal. In addition to this Ive had a message pop up a few times in the last week saying The Microsoft Windows Malicious Software removal tool had found something (cant remember what it was called sorry)last night I used the tool and it said it found win32:alureon and had partially removed it and i needed to do a full scan with my antivirus, i did that and it didnt find anything. i also did a boottime scan and malwarebytes scan and it stil isnt finding anything. The only other thing I have noticed (again not sure if it is related)when Im starting up the laptop, lots of times lately windows explorer is not running, theres just the screen with my mouse curser but no taskbar or desktop items and i have to press the power button to shut it down.

I suspect you have viral infection so please can you do the following steps to ensure that you are malware free:
1.Do a dr.web cure it! scan
http://www.freedrweb.com/cureit/?lng=en
2.Do a mbam scan or sas scan
http://www.malwarebytes.org/mbam.php
http://www.superantispyware.com/
3.Post a hijack hunter log here with default options
http://www.novirusthanks.org/products/hijack-hunter/
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Do a root repeal scan:CAUTION THIS MAY LEAD TO A BSoD SO SAVE YOUR WORK BEFORE DOING THIS
1.Download the program from here
http://sites.google.com/site/rootrepeal/
2.run the program,then click or report tab
3.click on scan button
4.choose all check boxes
5.ok
6.select all drivers
7.ok
8.A text file will be appear save it to your desktop and post it here