I have a HP Probook 4520s with Windows 7 Ultimate, i5 Processor and 2 GB RAM.
For the last couple of days, when I turn on my laptop, the CPU usage rises up to 100% and remains there for 10-15 minutes. No offending process shows up in Task Manager/Process Explorer but the laptop is practically unusable for that time. This has been happening for 2-3 months.
What can I do now?
I don't have any Apple application. I just use the common applications.