Using the Windows update method, your installation partition should have 750MB (32-bit version), and 1050MB (64-bit version).The update should take about 30 minutes to install. If automatic updates were on then, you should get the notification automatically. The easiest way to upgrade to Windows 7 Service Pack 1 is to use Windows update. It’s not a major upgrade, but if you want to keep your computer safer and up-to-date, you might want to install it. It includes some performance and security upgrades. What does the Windows 7 Service Pack upgrade include? If your computer is already running Windows 7 Service Pack 1 then there is no need to install a service pack upgrade.
Step 1 : Download PC Repair & Optimizer Tool (WinThruster for Win 10, 8, 7, Vista, XP and 2000 – Microsoft Gold Certified).Before addressing any computer issue, I always recommend scanning and repairing any underlying problems affecting your PC health and performance: