1. if you did a factory restore, there may be a trial version of some antivirus that needs to be uninstall since you said you installed your own antivirus. You should only one one antivirus installed on your computer. more than that will slow your system down.
2. since you said it is a new install, the computer could be indexing your system. it will slow your system down for a day or so depending how much stuff is on the computer and how long the computer is powered on. you can disable it to see if that is the cause.
Recently did a complete system restore on my laptop and put in anti virus outlook word and all the necessities to get it working again. Runs on windows 7.
From time to time it keeps freezing whether on line or writing letters (blue windows will keeps rotating) What is causing the PC to freeze go slow like this? No viruses detected and PC recently restored. Thank you.