Check msconfig>startup to see what's starting up with your computer. I only allow AV and gadgets. Others are freeloaders on startup, RAM and CPU at all times.
Google repeat errors in Event Viewer>Admin view to find how others have solved them. Same with the Performance log on Advanced Tools page accessed by clicking WEI score at Computer>properties. Look for issues cued on Advanced Tools page, then Generate a System Health Report.
Clean and order the HD perfectly with free state-of-the-art CCleaner and Auslogics Disk and Registry defraggers monthly.
Run SFC /SCANNOW Command - System File Checker
As a last resort consider a Repair Install
which reinstalls the OS while keeping all programs, files and settings in place.
However a clean install is often a superior install to in-place Upgrade or factory install:
Make your Recovery DIsks or save a Windows 7 backup image of the entire HD first so you have a path back to factory condition. Then wipe the HD of all code: SSD / HDD : Optimize for Windows Reinstallation
The installer is mostly driver
-complete, with newer arriving quickly via optional Windows Updates. Any drivers
then missing in Device Manager can be found on the Support Downloads webpage for your model computer or device.
Install updates and then programs slowly over time to gauge performance after each. Don't let any programs write themselves into msconfig>Startup as they become freeloaders on your RAM/CPU and can spy on you. I only allow AV and gadgets. http://www.sevenforums.com/crashes-d...-msconfig.html
Use a lightweight free AV like MS Security Essentials which works perfectly with Windows 7 Firewall. http://www.microsoft.com/security_essentials/
When it is finished, clean and order the HD perfectly using state-of-the-art free CCleaner then Auslogics Disk and Registry defraggers monthly. CCleaner - Free software downloads and software reviews - CNET Download.com Auslogics Disk Defrag - Reviews and free Auslogics Disk Defrag downloads at Download.com Auslogics Registry Defrag - Free software downloads and software reviews - CNET Download.com
Then save a Windows 7 Backup image externally so you never have to reinstall again, just reimage the HD or replacement using DVD or Repair CD. Backup Complete Computer - Create an Image Backup