unsure of your operating system, if XP then firstly on boot press F8 this will take you into safe mode.
When in safemode goto start> type into the run box > msconfig> that will take you to a box and you will find along the top a row of tabs the start up tab is the one we want, disable all is the box to tick, the laptop will reboot,
re install malwarebytes anti malware, and also superantispyware, they compliment each other,
make sure both are updated before beginning scan
the secret is, to scan with both anti virus tools (full scan) and keep scanning until both report system is clear. the beauty of these antivirus tools is that they scan the system restore folder as a default. if you follow this you should have a clean laptop at the end.
continue to use both and keep updating are regular intervals.
bob macdonald
March 2010