I just installed the new windows update after months of my computer failing to do the update due to the antivirus protector not compatible with the new iOS. I uninstalled the old antivirus and did the update (as of two weeks ago). Ever since the new update my computer runs extremely slow, freezes constantly, having to reboot 3-6 times a day, can't run certain programs before the update. I have taken in to the IT department where I attend school, they were able to clean and get rid of a lot of unused apps install a different antivirus. Unfortunately, this didn't help. Any ideas why this is happening? Never had any issues with my Lenovo.