I booted up the laptop and it was taking ages to load anything so I opened task manager and a process called unit.exe was taking up 97-99 percent of cpu.I ended the process to be able to run the laptop programmes.Its an old laptop with minimum ram and processor and Xp but its all my dad needs. I scanned with Malware bytes but it found nothing.I followed a forum instructions to use Combofix(which I have used before today) and its scanning for about half anhour and not got to the percentage stage yet. I got a low memory warning in the middle of the scan so I had to click on ok. only time I moved the mouse. Should I leave combofix running for another say half an hour or should I reboot. help asap would be appreciated.