Certainly, we are here to help you.
In your post you mentioned as, if you have McAfee installed in your computer, it takes a long time to restart.
In order to proceed further with this issue, I would like to know few details. Please let me know the following details :
Whether it is a XP 64 Bit or 32 Bit OS ?
Whar are the McAfee components installed in your computer ?
The version of McAfee SaaS & the DAT .
The RAM Size of your computer.
Is there any 3rd Party Antivirus program installed in your computer ?
Also please try doing a Clean Boot and let me know the status so that I can help you with this issue further.